All Calculators Directory
Complete alphabetical A–Z index of every calculation engine on CalcyZone. Fast, accurate, and completely free.
Letter #
3 tools0/1 Knapsack DP Calculator & Visualizer
Interactive 0/1 Knapsack dynamic programming matrix solver showing DP cell updates, take/skip decisions, and item selection.
2D Vector Calculator
Calculate magnitude and angle of 2D vector.
3D Vector Calculator
Calculate magnitude and direction cosines of 3D spatial vector.
Letter A
21 toolsAcceleration Calculator
Calculate linear acceleration from force and mass or velocity and time.
Acceleration from Velocity Calculator
Calculate acceleration from initial and final velocities.
Acres to Sq Ft Converter
Convert acres to square feet for real estate and land planning.
Add Days to Date Calculator
Add a specific number of days, weeks, or months to a starting date to find the future date.
Age Calculator
Calculate your exact age in years, months, days, total weeks, and next birthday countdown.
Airline Baggage & Overweight Fee Calculator
Calculate expected checked luggage, carry-on, overweight, and excess baggage fees before heading to the airport.
Angle & Rotation Converter
Convert Degrees, Radians, Gradians, and Revolutions.
Angular Acceleration Calculator
Calculate rate of change of angular velocity.
Angular Displacement Calculator
Calculate total rotation angle in radians or revolutions.
Angular Frequency Calculator
Calculate angular frequency in radians per second (ω = 2π f).
Angular Momentum Calculator
Calculate rotational momentum (L = I ω).
Angular Velocity Calculator
Calculate angular rotation rate in radians per second.
Angular Velocity to RPM Converter
Convert radians per second (rad/s) to revolutions per minute (RPM).
Appliance Electricity Cost Calculator
Calculate power consumption (kWh) and operating cost for household electrical appliances.
Archimedes Principle Calculator
Calculate buoyant force equal to weight of displaced fluid.
Area Converter
Universal area unit converter for acres, hectares, square feet, square meters, and square miles.
Area Expansion Calculator
Calculate surface area increase due to temperature change.
Average Calculator
Calculate the arithmetic mean, sum, count, and statistical summary of a dataset.
Average Speed Calculator
Calculate scalar average speed from total distance over time.
Average Velocity Calculator
Calculate vector average velocity from net displacement over total time.
Avogadro Law Calculator
Calculate gas volume to molar quantity ratio (V1 / n1 = V2 / n2).
Letter B
20 toolsBaking Ingredient Weight-to-Volume Calculator
Convert baking cups to grams for flour, sugar, butter, and cocoa powder by ingredient density.
Battery Runtime Calculator
Calculate estimated battery discharge runtime hours based on amp-hour capacity and load.
Beam Deflection Calculator
Calculate peak elastic flexural deflection of structural beams.
Beam Load Calculator
Calculate bending moments and shear reactions in structural beams.
Bending Moment Calculator
Calculate maximum internal flexural bending moment.
Bending Stress Calculator
Calculate maximum flexural tensile or compressive bending stress (σ = M y / I).
Bernoulli Equation Calculator
Calculate fluid pressure, velocity, and elevation relationships along a streamline.
Bill Split Calculator
Split restaurant bills and tips evenly or proportionally among a group of people.
Binary Search Calculator & Visualizer
Interactive step-by-step Binary Search visualizer with lower/upper range tracking and O(log n) elimination.
BMI Calculator (Body Mass Index)
Calculate your Body Mass Index (BMI) and BMI Prime value with official weight classification categories.
BMR Calculator (Basal Metabolic Rate)
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor and Katch-McArdle equations.
Body Surface Area (BSA) Calculator
Calculate Body Surface Area using Mosteller and DuBois formulas.
Boyle Law Calculator
Calculate pressure volume relationship at constant temperature (P1 V1 = P2 V2).
Breadth First Search (BFS) Visualizer
Step-by-step BFS graph traversal visualizer tracking queue operations and visited node sets.
Break Even Calculator
Calculate break even unit volume and revenue to cover fixed and variable costs.
Brick & Masonry Wall Calculator
Calculate brick quantities, mortar volume, cement bags, and sand for single and double brick walls.
Bubble Sort Visualizer & Step Calculator
Interactive step-by-step Bubble Sort execution visualizer with comparisons, swaps, and time complexity breakdown.
Bulk Modulus Calculator
Calculate volumetric elasticity resistance to uniform compression.
Buoyancy Calculator (Archimedes)
Calculate buoyant force on a submerged object and whether it floats or sinks.
Business Days Calculator
Calculate business days between dates excluding weekends with configurable weekend schedules.
Letter C
34 toolsCAGR Calculator
Calculate the compound annual growth rate of an investment, revenue or any value over time.
Cantilever Beam Calculator
Calculate maximum bending moment and tip deflection for end loaded cantilever beam.
Capacitance Calculator
Calculate charge storage capacitance (C = Q / V).
Capacitor Energy Calculator
Calculate energy and charge stored in a capacitor.
Car Rental Total Cost Calculator
Calculate true rental car expenses including daily base rate, collision insurance, airport fees, tolls, and gas refill.
Celsius to Fahrenheit Converter
Convert °C to °F instantly.
Centripetal Acceleration Calculator
Calculate inward radial acceleration in circular motion.
Centripetal Force Calculator
Calculate centripetal force and acceleration for circular motion.
Change in Momentum Calculator
Calculate net momentum difference Δp = m(v₂ - v₁).
Charles Law Calculator
Calculate volume temperature relationship at constant pressure (V1 / T1 = V2 / T2).
Circle Calculator (Area, Circumference)
Enter a radius, diameter, circumference or area and get every other circle measurement.
Circuit Power Calculator
Calculate total power consumed or dissipated by electrical circuit.
Circular Motion Calculator
Calculate period, frequency, and force of circular trajectory.
CM to Inches Converter
Convert centimeters to inches instantly.
Coefficient of Friction Calculator
Calculate friction coefficient μ from force and normal load.
Coefficient of Restitution Calculator
Calculate elasticity ratio e of collision (e = relative velocity after / before).
Collision Calculator
Calculate final velocities after elastic or inelastic 1D collisions.
Combination Calculator
Calculate nCr combinations where item order does not matter.
Combined Gas Law Calculator
Calculate changes in pressure, volume, and temperature for gas sample.
Commission Calculator
Calculate sales commission payouts, commission rates, and total sales earnings.
Compound Interest Calculator
Calculate compound interest growth, annual compounding returns, and future investment values.
Comprehensive Trip Budget Calculator
Estimate total vacation budget across transport, accommodation, food, activities, and emergency buffer funds.
Computer Science & DSA Interview Preparation Hub
Comprehensive DSA problem solving roadmaps, 22 algorithm patterns, core CS checklists, and system design exercises.
Concrete Volume & Mix Calculator
Calculate concrete volume, dry materials, cement bags, sand, aggregate, and water for slabs, footings, and columns.
Construction BOQ & Cost Estimator
Comprehensive Bill of Quantities estimator for total house construction, labor split, waste, contractor profit, and taxes.
Continuity Equation Calculator
Calculate fluid velocity change across varying pipe cross section (A1 v1 = A2 v2).
Coulomb's Law Calculator
Calculate the electrostatic force between two point charges.
Country Distance Calculator
Calculate straight line distance between major world countries and capital cities.
CPU Job Scheduling & Gantt Chart Calculator
Calculate FCFS, SJF, SRTF, and Round Robin CPU process scheduling metrics with interactive Gantt chart visualizers.
Cross Product Calculator
Calculate 3D vector cross product A × B perpendicular vector.
Cube Root Calculator
Calculate real cube roots cbrt(x) for positive and negative numbers.
Currency Converter
Convert between USD, EUR, GBP, INR, JPY, and 160+ world currencies with current available exchange rates.
Current Calculator
Calculate electric current flow I = V / R in amperes.
Current Divider Calculator
Calculate current branch distribution in parallel circuits.
Letter D
27 toolsDaily Travel Spending & Allowance Tracker
Track daily travel expenses in real time to calculate remaining discretionary daily allowance while on vacation.
Daily Water Intake Calculator
Calculate optimal daily water hydration based on weight, exercise duration, and ambient climate.
Data Storage Converter
Convert digital storage sizes distinguishing Decimal (KB, MB, GB) and Binary (KiB, MiB, GiB) standards.
Date Difference Calculator
Calculate the total time difference between any two calendar dates with inclusive or exclusive options.
Date to Unix Timestamp
Convert any human readable date and time into Unix epoch timestamps in seconds or milliseconds.
Day of Week Calculator
Find the exact day of the week (Monday through Sunday) for any historical or future date.
Days Between Dates Calculator
Calculate the exact number of days between two dates.
Days in Month Calculator
Calculate the total number of days in any month for any year with leap year awareness.
Days Until Date Calculator
Calculate how many days remain until a future target date or milestone event.
Decibel Calculator (Power & Amplitude)
Convert power or amplitude ratios to decibels.
Decimal Degrees to DMS Converter
Convert decimal degree coordinates to Degrees, Minutes, and Seconds (DMS) format.
Decimal Hours Calculator
Convert between hours and minutes format (HH:MM) and decimal hours format (e.g. 7:30 to 7.5).
Decimal to Fraction Calculator
Convert terminating or repeating decimals into exact simplified fractions.
Density Calculator (Mass, Volume)
Solve ρ = m/V for density, mass or volume.
Depth-First Search (DFS) Visualizer
Run depth-first search on your own graph and step through the stack and visit order.
Destination Point Calculator
Calculate destination coordinates given a starting point, initial compass bearing, and travel distance.
Digital Logic & Truth Table Generator
Generate interactive truth tables and evaluate Boolean logic gates (AND, OR, NOT, NAND, NOR, XOR, XNOR).
Dijkstra Algorithm Calculator & Visualizer
Step-by-step Dijkstra shortest path algorithm runner with distance tables, priority queue state, and edge relaxation logs.
Dilution Calculator (C₁V₁ = C₂V₂)
Work out how much stock solution and solvent you need to make a diluted solution.
Discount Calculator
Calculate final sale prices, total savings, and percentage discounts.
Distance Calculator
Calculate straight-line geodesic (Haversine) distance between geographic coordinates or world cities.
Distance from Acceleration Calculator
Calculate displacement gained under linear acceleration.
DMS to Decimal Degrees Converter
Convert Degrees, Minutes, and Seconds (DMS) coordinates to Decimal Degrees (DD).
Dog Age in Human Years Calculator
Calculate your dog’s true age in human years based on body size and weight classification.
Doppler Effect Calculator (Sound)
Calculate the observed frequency when a sound source or observer moves.
Dot Product Calculator
Calculate scalar dot product A · B.
Driving Time & ETA Rest Stop Calculator
Calculate realistic driving arrival times by incorporating recommended highway rest breaks and fatigue safety stops.
Letter E
23 toolsEarth Curvature Drop Calculator
Calculate vertical drop and hidden obstacle height over distance due to Earth curvature.
Earth Radius by Latitude Calculator
Calculate the exact WGS-84 ellipsoidal Earth radius at any specified latitude.
ECEF to Lat Long Height Converter
Convert 3D Earth-Centered, Earth-Fixed (ECEF) Cartesian coordinates (X, Y, Z) to WGS-84 latitude, longitude, and ellipsoidal height.
Elastic Collision Calculator
Calculate final velocities in perfectly elastic 1D collision conserving kinetic energy.
Elastic Modulus Calculator
Calculate linear elastic stress strain modulus.
Elastic Potential Energy Calculator
Calculate potential energy stored in compressed or stretched spring.
Electric Charge Calculator
Calculate total electrical charge from current and time (Q = I t).
Electric Field Calculator
Calculate electric field intensity created by point charge.
Electric Force Calculator
Calculate force exerted on charge in electric field.
Electric Potential Calculator
Calculate electric potential voltage around point charge.
Electric Potential Energy Calculator
Calculate potential energy between two point charges (U = k q1 q2 / r).
Electrical Load Calculator
Calculate total electrical current load consumption in amperes.
Electrical Power Calculator
Calculate electrical power dissipation in watts (P = VI = I²R).
Electrical Units Converter
Convert Volts, Amperes, Ohms, Watts, Farads, and Coulombs.
Elevation, Grade & Slope Calculator
Calculate slope percentage, elevation rise/run angle in degrees, and topographic gradient.
EMI Calculator (Home, Car & Personal Loan)
Calculate your monthly EMI for a home, car or personal loan in India, see the full amortisation schedule, and find out how much interest a prepayment saves.
Energy & Work Converter
Convert Joules, Calories, Kilowatt-hours (kWh), BTU, and Foot-pounds.
Energy Conservation Calculator
Verify conservation of mechanical energy between two points in frictionless system.
Engineering Strain Calculator
Calculate dimensionless fractional elongation strain.
Escape Velocity Calculator
Calculate escape velocity from Earth, the Moon, Mars, Jupiter or a custom body.
EV Road Trip & Charging Stop Calculator
Plan Electric Vehicle road trips by calculating required fast charging stops, total charging duration, and energy costs.
Exact Age Calculator
Calculate precise chronological age down to total days, weeks, hours, and minutes.
Exponent Calculator
Calculate powers, exponents, base raised to power x^y, and scientific exponentiation.
Letter F
26 toolsFactor of Safety Calculator
Calculate engineering structural design factor of safety (FOS = Ultimate / Allowable).
FD Calculator (Fixed Deposit)
Calculate fixed deposit maturity with bank-style quarterly compounding, or the monthly/quarterly interest payout of a non-cumulative FD.
Feet to Meters Converter
Convert feet to meters with exact SI conversion factors.
Final Exam Grade Calculator
Find the score you need on your final exam to reach a target course grade.
Final Velocity Calculator
Calculate final velocity after constant acceleration.
Flight Cost Per Mile Calculator
Determine true airfare value by calculating the exact cost per mile flown including ticket price, seat selection, and baggage fees.
Flight Duration & Distance Calculator
Calculate flight time, great circle geodesic distance, and estimated airborne hours between any global airport coordinates.
Floor & Wall Tile Calculator
Calculate tile boxes, individual tile count, grout kg, and mortar bedding for flooring.
Floor Area and Concrete Volume Calculator
Calculate floor surface area, slab perimeter, concrete volume, and estimated concrete bags.
Flow Rate Calculator
Calculate volumetric and mass flow rates through pipe or channel.
Fluid Hydrostatic Pressure Calculator
Calculate hydrostatic pressure at depth h in fluid of density ρ.
Fluid Velocity Calculator
Calculate flow velocity v = Q / A inside duct or pipe.
Force & Load Converter
Convert Newtons, Kilonewtons, Pound-force (lbf), and Kilogram-force.
Force Calculator
Calculate force using mass and acceleration based on Newton second law of motion (F = ma).
Force from Momentum Calculator
Calculate net force from rate of change of momentum (F = dp/dt).
Fraction Calculator
Add, subtract, multiply, and divide proper, improper, and mixed fractions.
Fraction Simplifier Calculator
Reduce fractions to their simplest lowest terms and mixed number format.
Fraction to Decimal Calculator
Convert fractions and mixed numbers into exact decimal values and percentages.
Free Fall Calculator
Find fall time and impact speed from a height, with a distance–time table.
Free Fall Time Calculator
Calculate duration of free fall from given height.
Free Fall Velocity Calculator
Calculate velocity acquired during gravitational drop.
Frequency & Rate Converter
Convert Hertz (Hz), kHz, MHz, GHz, and RPM.
Frequency to Period Converter
Convert frequency in Hertz to period in seconds.
Friction Calculator
Calculate static and kinetic friction force (Ff = μ N).
Friction Force Calculator
Calculate resistive force opposing movement.
Fuel Economy Converter
Convert MPG (US & Imperial), L/100km, and km/L with non-linear reciprocal equations.
Letter G
22 toolsGas Density Calculator
Calculate density of ideal gas (ρ = P M / R T).
Gas Pressure Calculator
Calculate container gas pressure P = nRT / V.
Gas Temperature Calculator
Calculate gas temperature in Kelvin or Celsius.
Gay-Lussac Law Calculator
Calculate pressure temperature relationship at constant volume (P1 / T1 = P2 / T2).
GB to MB Converter
Convert gigabytes to megabytes in decimal (1000 MB) or binary (1024 MiB).
GCD Calculator (Greatest Common Divisor)
Calculate the greatest common divisor (GCD) or highest common factor (HCF) of numbers.
Geostationary Orbit Calculator
Calculate exact altitude for 24-hour geostationary orbit.
Global Geodesic Flight Distance Calculator
Measure exact point-to-point air distance between geographic coordinates using geodesic haversine calculations.
GMT to UTC Converter
Convert between Greenwich Mean Time (GMT) and Coordinated Universal Time (UTC) with historical explanations.
GPA Calculator (4.0 Scale)
Calculate your credit-weighted GPA on the standard US 4.0 scale from letter grades and credits.
GPS Coordinate Converter
Convert GPS coordinates between Decimal Degrees (DD), Degrees Minutes Seconds (DMS), and Degrees Decimal Minutes (DDM).
GPS Waypoint ETA Calculator
Calculate estimated time of arrival (ETA) and average speed across multiple GPS waypoints.
Gravitational Acceleration Calculator
Calculate free fall gravitational acceleration g = G M / r².
Gravitational Field Calculator
Calculate vector gravitational field intensity g = F / m.
Gravitational Force Calculator
Calculate the Newtonian gravitational attraction between two masses.
Gravitational Potential Energy Calculator
Calculate potential energy stored by an elevated object in a gravitational field.
Gravitational Potential Energy Calculator
Calculate potential energy mgh on Earth, the Moon, Mars or with custom gravity.
Gravity Calculator
Calculate gravitational field strength and acceleration on planet surface.
Group Travel Expense Splitter
Calculate fair share group trip expenses, balances, and who owes whom after group travel outlays.
GST Calculator (Inclusive & Exclusive)
Add or remove GST from a price and split the tax into CGST + SGST (intra-state) or IGST (inter-state).
GTU CGPA to Percentage Calculator
Convert your Gujarat Technological University (GTU) CGPA/CPI to percentage with the official formula and see your class.
Gujarat University CGPA to Percentage Calculator
Convert Gujarat University (Ahmedabad) CBCS CGPA to percentage using the ×10 rule from the university’s ordinance.
Letter H
16 toolsHabit Consistency & Completion Score Calculator
Calculate habit adherence percentage, streak milestones, and progress score over weekly or monthly cycles.
Half-Life Calculator
Calculate how much of a radioactive or decaying substance remains after a given time.
Haversine Distance Calculator
Compute exact great-circle distance between two latitude and longitude coordinates using the Haversine trigonometric formula.
Haversine Great-Circle Distance Calculator
Compute the shortest great-circle distance between any two coordinates on Earth using the Haversine formula.
Heap Sort Visualizer (Step-by-Step)
Watch heap sort build a max-heap and extract elements, with animated bars and every swap explained.
Heart Rate Zone Calculator (Karvonen)
Estimate maximum heart rate and five training zones using the Tanaka and Karvonen formulas.
Heat Calculator
Calculate heat transfer Q = m c ΔT.
Heat Capacity Calculator
Calculate total heat capacity C = m c of an object.
Heat Transfer Calculator
Calculate rate of thermal conduction through material (Q/t = k A ΔT / d).
Hooke's Law Calculator
Calculate spring force and stored elastic energy from spring constant and extension.
Horizon Distance Calculator
Calculate the line-of-sight distance to the visible horizon based on observer elevation and Earth radius.
Hotel Resort Fee & True Nightly Rate Calculator
Uncover the real total cost per night of hotel rooms after mandatory resort fees, facility charges, and room taxes.
Hourly to Salary Calculator
Convert hourly wages into equivalent annual salary, monthly pay, and biweekly paychecks.
Hours Calculator
Add, subtract, and total hours and minutes for timesheets and payroll.
Hours to Minutes Calculator
Convert hours (including decimal hours) into total minutes.
Hydrostatic Pressure Calculator
Calculate total fluid pressure including atmospheric pressure.
Letter I
19 toolsIdeal Body Weight Calculator
Calculate ideal body weight (IBW) using Devine, Hamwi, Robinson, and Miller equations.
Ideal Gas Law Calculator (PV = nRT)
Solve PV = nRT for pressure, volume, moles or temperature in SI units.
Impulse Calculator
Calculate impulse imparted by force over time duration (J = F dt).
Inches to CM Converter
Convert inches to centimeters with exact 2.54 conversion factor.
Inclined Plane Acceleration Calculator
Calculate acceleration down ramp with optional friction.
Inclined Plane Calculator
Calculate parallel force, normal force, and acceleration on an inclined plane.
Inclined Plane Force Calculator
Calculate gravitational force pulling mass down a slope.
Inclined Plane Friction Calculator
Calculate friction force opposing movement on ramp.
Inclined Plane Mechanical Advantage Calculator
Calculate ideal mechanical advantage IMA = 1 / sin(θ) = length / height.
Inclined Plane Normal Force Calculator
Calculate normal force perpendicular to inclined surface.
Income Tax Calculator India FY 2026-27 (Old vs New)
Compare tax under the new and old regimes for FY 2026-27 (AY 2027-28), including standard deduction, 87A rebate with marginal relief, surcharge and 4% cess.
Inelastic Collision Calculator
Calculate final velocity when colliding masses stick together.
Inflation Calculator (Future Cost)
See how much something will cost in future at a given inflation rate, and how purchasing power erodes.
Inflation-Adjusted SIP Calculator
Find what your future SIP corpus will be worth in today's rupees after accounting for inflation.
Initial & Final Bearing Calculator
Calculate forward initial compass bearing and reverse final bearing between two geographic coordinates.
Initial Velocity Calculator
Calculate initial launch or starting velocity.
Insertion Sort Visualizer & Step Generator
Interactive Insertion Sort step generator showing array shifts and key element insertion.
International Tipping & Etiquette Guide
Calculate local tipping etiquette, recommended percentage, and final restaurant bill for over 5 major global regions.
IPv4 Subnet & CIDR Calculator
Calculate network address, broadcast address, subnet mask, wildcard mask, and usable IP range for any IPv4 address and CIDR prefix.
Letter K
8 toolsKeplers Third Law Calculator
Calculate orbital period square to radius cube proportionality ratio (T² ∝ r³).
KG to LBS Converter
Convert kilograms to pounds for gym workouts, body weight, and cooking.
Kinematics SUVAT Calculator
Solve linear kinematics equations for displacement, velocity, acceleration, and time.
Kinetic Energy Calculator
Calculate the kinetic energy of a moving object from its mass and speed, with momentum and steps.
Kinetic Friction Calculator
Calculate sliding friction resistive force.
Kitchen & Cooking Units Converter
Convert Tablespoons, Teaspoons, Cups, Fluid Ounces, and Milliliters.
KM to Miles Converter
Convert kilometers to miles for driving distances and running races.
Kruskal's Minimum Spanning Tree Visualizer
Step-by-step Kruskal's MST calculator showing sorted edge processing, disjoint-set (DSU) cycle checks, and accepted/rejected edges.
Letter L
13 toolsLat Long Height to ECEF Converter
Convert WGS-84 latitude, longitude, and ellipsoidal height into 3D Earth-Centered, Earth-Fixed (ECEF) X, Y, Z Cartesian coordinates.
Lat/Long to UTM Converter
Convert geographic latitude and longitude coordinates into Universal Transverse Mercator (UTM) zone and metric coordinates.
Latent Heat Calculator
Calculate heat required for phase change without temperature change (Q = m L).
Layover Time & Connection Risk Calculator
Assess flight connection safety, layover feasibility, and city excursion opportunities based on transit duration.
LCM Calculator (Least Common Multiple)
Find the least common multiple (LCM) of two or more numbers.
Leap Year Calculator
Determine whether any year is a leap year and view next and previous leap years.
Length Converter
Universal length and distance unit converter for metric, imperial, and nautical measurements.
Linear Search Calculator
Step-by-step Linear Search calculator checking elements sequentially in unsorted arrays.
Live Currency Converter & Exchange Rates
Convert global currencies with ISO 4217 support (USD, EUR, GBP, JPY, CAD, AUD, INR, CHF, etc.).
Loan Calculator
Calculate monthly loan payments, interest costs, and amortization schedules.
Loan Payment Calculator
Determine how much you can afford to borrow based on desired monthly payments.
Logarithm Calculator (Any Base)
Compute log of any number to any base, plus natural log, log₁₀ and log₂, using the change-of-base rule.
Lumpsum Investment Calculator
Calculate the future value of a one-time (lumpsum) mutual fund investment with annual compounding, plus its inflation-adjusted value.
Letter M
29 toolsMacronutrient Calculator (Protein, Carbs & Fat)
Calculate optimal protein, carbohydrate, and fat intake grams for cutting, maintenance, or bulking.
Map Scale Calculator
Convert between map measurement distance, real-world distance, and map scale ratios (e.g. 1:24,000).
Markup Calculator
Calculate retail selling prices, gross profit, and markup percentages from cost.
Mass & Weight Converter
Universal mass and weight converter for kg, lbs, grams, ounces, stones, and tons.
Mass Calculator
Calculate mass from force and acceleration.
Mass Density Calculator
Calculate mass density of solids, liquids, or gases.
Mass Flow Rate Calculator
Calculate mass of fluid passing per second.
Material Density Calculator
Calculate material density and specific gravity for engineering design.
Mechanical Efficiency Calculator
Calculate energy or power efficiency percentage of a system.
Mechanical Energy Calculator
Calculate total mechanical energy (sum of kinetic and potential energy).
Mechanical Power Calculator
Calculate rate of mechanical energy work transfer.
Median Calculator
Find the exact middle number of a sorted set of numbers.
Meeting Time Finder
Find overlapping working hours across multiple global cities to schedule international meetings.
Merge Sort Visualizer
Interactive divide and conquer Merge Sort step generator showing array splitting and merging.
Meters to Feet Converter
Convert meters to feet and inches instantly with precision calculations.
Midpoint Coordinate Calculator
Calculate the exact half-way geographic midpoint along the great-circle path between two coordinates.
Miles to KM Converter
Convert miles to kilometers accurately.
Minutes Calculator
Add and subtract minutes and seconds with automatic hours conversion.
Minutes to Hours Calculator
Convert total minutes into formatted hours, minutes, and decimal hours.
Minutes to Seconds Calculator
Convert minutes into total seconds.
Mode Calculator
Find the most frequently occurring value or values in a set of numbers.
Molar Mass Calculator
Calculate molar mass, molecular weight, and mass percentage breakdown from chemical formulas.
Molar Mass from Formula
Calculate the molar mass of any chemical compound from elemental atomic masses and atom counts.
Molar Volume Calculator
Calculate volume occupied by 1 mole of gas at STP.
Molarity Calculator
Calculate the molar concentration of a solution from solute mass, molar mass and solution volume.
Moment of Inertia Calculator
Calculate rotational mass moment of inertia for rods, disks, spheres, and hoops.
Momentum Calculator
Calculate linear momentum p = mv and the corresponding kinetic energy.
Mortgage and Loan Calculator
Calculate monthly mortgage payments, interest costs, and total repayment schedules.
Multiple Discount Calculator
Calculate stacked or compound successive discounts (e.g., 20% off plus extra 10% off).
Letter N
6 toolsNet Force Calculator
Calculate vector sum of multiple applied forces.
Newtons First Law Calculator
Determine net zero acceleration equilibrium status for stationary or constant velocity bodies.
Newtons Second Law Calculator
Calculate acceleration, mass, or force using F = ma.
Newtons Third Law Calculator
Compute equal and opposite reaction force pairs.
Normal Force Calculator
Calculate perpendicular contact force on flat or inclined surface.
NSC Calculator (National Savings Certificate)
Calculate the 5-year maturity value of Post Office National Savings Certificate (NSC VIII issue), compounded annually.
Letter O
7 toolsOhm's Law and Power Calculator
Calculate voltage, current, resistance, and electrical power with instant unit conversions.
One Rep Max (1RM) Calculator
Estimate your 1RM maximum lift weight using Epley, Brzycki, and Lander formulas.
Orbital Period Calculator
Calculate orbital revolution period using Kepler third law.
Orbital Radius Calculator
Calculate orbital semi-major axis radius from orbital period.
Orbital Velocity & Period Calculator
Calculate circular orbit speed and period at any altitude above Earth, the Moon, Mars or Jupiter.
Oscillation Amplitude Calculator
Calculate maximum displacement peak from center rest position.
Oscillation Frequency Calculator
Calculate cycles per second for harmonic system (f = 1/T).
Letter P
45 toolsParallel Axis Theorem Calculator
Calculate shifted moment of inertia about parallel axis (I = I_cm + m d²).
Parallel Capacitor Calculator
Calculate total equivalent capacitance for capacitors in parallel.
Parallel Resistor Calculator
Calculate the equivalent resistance of any number of resistors in parallel.
Parallel Springs Calculator
Calculate equivalent spring constant for side-by-side springs.
Pendulum Period Calculator
Calculate a simple pendulum’s period and frequency with a large-amplitude correction.
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number instantly.
Percentage Change Calculator
Calculate the percentage change (increase or decrease) between an old value and a new value.
Percentage Decrease Calculator
Calculate the percentage reduction or decrease from an initial value to a lower value.
Percentage Difference Calculator
Calculate the relative percentage difference between two numbers when neither is a baseline.
Percentage Increase Calculator
Calculate the percentage growth or increase from an initial value to a final value.
Percentage of Marks Calculator
Find your exam percentage from marks obtained and total marks.
Perfectly Inelastic Collision Calculator
Calculate common final velocity when two bodies join together upon impact.
Period to Frequency Converter
Convert oscillation period in seconds to frequency in Hertz.
Permutation Calculator
Calculate nPr permutations where item order matters.
Perpendicular Axis Theorem Calculator
Calculate moment of inertia for planar laminar bodies (Iz = Ix + Iy).
pH Calculator
Convert between pH, pOH, [H⁺] and [OH⁻] for aqueous solutions at 25 °C.
Phase Change Energy Calculator
Calculate heat for melting, fusion, or vaporization.
Physics Density Calculator
Calculate density from mass and volume (ρ = m / V).
Physics Distance Calculator
Calculate displacement or distance traveled under constant velocity or acceleration.
Physics Power Calculator
Calculate rate of work done or energy transfer per unit time (P = W/t).
Physics Time Calculator
Calculate duration from distance and velocity.
Pipe Flow Calculator
Calculate fluid velocity and flow rate in pipes.
Plastering Material Calculator
Calculate cement bags and sand for wall plastering (12mm, 15mm, 20mm thickness).
Pomodoro & Focus Session Calculator
Calculate session schedules, break intervals, and total focus time for study or work goals.
Post Office MIS Calculator (Monthly Income Scheme)
Calculate the monthly income from the Post Office Monthly Income Scheme (POMIS) for any deposit.
Power Converter
Convert Watts, Kilowatts, Horsepower (hp), and BTU/hr.
PPF Calculator
Calculate Public Provident Fund (PPF) maturity for yearly deposits over 15 years, with a year-wise growth table.
Pregnancy Due Date & Fertile Window Calculator
Calculate estimated due date using Naegele’s rule based on last menstrual period (LMP).
Pressure Calculator
Calculate pressure from force applied over cross area (P = F / A).
Pressure Converter
Convert Pascals, Bar, PSI, Atmospheres, and mmHg.
Prime Factorization Calculator
Decompose any integer into its unique prime factor product tree.
Prime Number Checker
Check whether a number is prime or composite and list its divisors.
Probability Calculator
Calculate single event probability, compound event probability, and odds ratios.
Profit Margin Calculator
Calculate gross profit margin percentage and net profit from revenue and costs.
Projectile Flight Time Calculator
Calculate total airborne time of a projectile.
Projectile Horizontal Distance Calculator
Calculate horizontal position at elapsed time t.
Projectile Launch Angle Calculator
Calculate required launch angle θ for targeted distance.
Projectile Max Height Calculator
Calculate maximum peak vertical height reached by projectile.
Projectile Motion Calculator
Find range, maximum height and flight time of a projectile launched at an angle, with a trajectory table.
Projectile Range Calculator
Calculate horizontal range distance of a projectile.
Projectile Trajectory Calculator
Map dynamic (x, y) parabolic coordinates over time.
Projectile Velocity Calculator
Calculate total velocity magnitude at any point along trajectory.
Projectile Vertical Distance Calculator
Calculate vertical elevation position at elapsed time t.
Proportion Calculator
Solve direct and inverse proportions to find missing variable values.
Pythagorean Theorem Calculator
Find the hypotenuse or a missing leg of a right triangle using a² + b² = c².
Letter Q
2 toolsQuadratic Equation Solver
Solve ax² + bx + c = 0 for real or complex roots, with the discriminant, vertex and full step-by-step working.
Quick Sort Visualizer & Partition Calculator
Step-by-step Quick Sort partition visualizer demonstrating pivot selection, left/right pointers, and recursion tree.
Letter R
27 toolsRandom Number Generator
Generate uniform random integers or decimals within a custom minimum and maximum range.
Range Calculator
Calculate the statistical range, minimum value, and maximum value of a dataset.
Ratio Calculator
Solve ratio scales, scale up or down ratios, and find missing ratio terms A:B = C:D.
Ratio Simplifier Calculator
Simplify ratios to their lowest whole number terms using the greatest common divisor.
RC Circuit Time Constant Calculator
Calculate RC time constant, charging voltage at any time and cut-off frequency.
RCC Slab Material & Steel Calculator
Calculate concrete volume, rebar steel weight, cement bags, sand, and gravel for roof slabs.
RD Calculator (Recurring Deposit)
Calculate the maturity value of a bank recurring deposit with quarterly compounding.
Recipe & Portion Scaler Calculator
Scale recipe ingredient quantities up or down based on original and desired serving counts.
Recipe Scaler Calculator
Instantly scale ingredient quantities up or down for any serving size or yield requirement.
Relative Velocity Calculator
Calculate relative speed between two moving observers or bodies.
Resistance Calculator
Calculate electrical resistance R = V / I in ohms.
Resistor Color Code Calculator
Decode 4-band and 5-band resistor colour codes into resistance and tolerance range.
Restaurant Tip & Group Bill Splitter
Calculate total tip amount, total bill with tax, and exact split per person for group dining.
Resultant Force Calculator
Calculate total magnitude and direction angle of combined orthogonal forces.
Reverse Discount Calculator
Calculate original pre-discount prices when you know the final price and discount percentage.
Rhumb Line / Loxodrome Distance Calculator
Calculate constant-bearing rhumb line (loxodrome) distance and navigational course angle between coordinates.
Road Trip Fuel Cost Calculator
Calculate total gas cost, fuel volume required, and per-mile driving expenses for any road trip itinerary.
Rocket Delta-V Calculator (Tsiolkovsky)
Calculate ideal velocity change (Delta-V) for spacecraft using the Tsiolkovsky rocket equation.
ROI Calculator (Return on Investment)
Calculate return on investment percentage, net profit, and investment gains.
Rotational Frequency Calculator
Calculate revolutions or cycles per second (f = ω / 2π).
Rotational Kinetic Energy Calculator
Calculate kinetic energy stored in a rotating body.
Rotational Power Calculator
Calculate mechanical power generated by torque and rotational speed.
Rotational Work Calculator
Calculate mechanical work performed by rotational torque over angular displacement.
Rounding Calculator
Round numbers to nearest integer, decimal place, significant figures, or nearest fraction.
RPM Calculator
Calculate revolutions per minute from angular frequency.
RPM to Angular Velocity Converter
Convert revolutions per minute (RPM) to radians per second (rad/s).
Running Pace & Speed Calculator
Calculate running pace per kilometer or mile, target speed, and projected finish time.
Letter S
52 toolsSalary to Hourly Calculator
Convert annual salary into equivalent hourly wage, weekly, biweekly, and monthly income.
Satellite Orbit Calculator
Calculate speed, period, and altitude of satellite in Earth orbit.
Savings Calculator
Calculate growth of savings deposits with interest compounding over time.
Savings Goal Calculator
Determine required monthly savings needed to reach a specific financial goal.
Schengen 90/180 Day Rolling Visa Calculator
Calculate remaining visa-free days allowed inside the Schengen Area under the 90-day within 180-day rolling rule.
Scientific Notation Calculator
Convert numbers into standard scientific notation (a * 10^b) and engineering notation.
SCSS Calculator (Senior Citizen Savings Scheme)
Calculate the quarterly interest from the Senior Citizens Savings Scheme (SCSS).
Seconds Calculator
Calculate total seconds and convert into minutes, hours, and days.
Seconds to Minutes Calculator
Convert total seconds into minutes and remaining seconds.
Section Modulus Calculator
Calculate section modulus Z = I / y for structural beam cross sections.
Selection Sort Visualizer & Calculator
Step-by-step Selection Sort execution visualizer tracking minimum element indices, swaps, and comparisons.
Series Capacitor Calculator
Calculate total equivalent capacitance for capacitors in series.
Series Resistor Calculator
Add resistors in series and see the current and voltage drop across each one.
Series Springs Calculator
Calculate equivalent spring constant for springs connected end-to-end.
SGPA to CGPA Calculator
Combine semester SGPAs into a cumulative CGPA, weighted by credits if you have them.
Shear Force Calculator
Calculate internal vertical shear force in loaded structural member.
Shear Strain Calculator
Calculate angular shear deformation strain.
Shear Stress Calculator
Calculate shear stress force per unit area parallel to cross section.
Shell Sort Visualizer (Step-by-Step)
Animate Shell sort with shrinking gaps and see each gapped insertion move.
SHM Calculator
Calculate displacement, velocity, and acceleration in Simple Harmonic Motion.
Simple Harmonic Motion Calculator
Calculate periodic oscillation parameters of harmonic oscillator.
Simple Interest Calculator
Calculate simple interest, total interest earned, and final balance over time.
Simple Pendulum Period Calculator
Calculate time required for full pendulum swing cycle.
Simply Supported Beam Deflection Calculator
Calculate maximum deflection and bending moment of a simply supported beam with centre point load or UDL.
SIP Calculator
Estimate the maturity value of a monthly Systematic Investment Plan (SIP) in mutual funds for any expected return and duration.
Sleep Cycle & Bedtime Calculator
Calculate optimal bedtimes and wake times based on 90-minute REM sleep cycles.
Slope Calculator (Two Points)
Find the slope, line equation, distance and angle between two points.
Sound Frequency Calculator
Calculate pitch frequency of sound wave.
Sound Intensity Calculator
Calculate acoustic sound energy power per unit area (I = P / A).
Sound Intensity Level Calculator
Calculate sound intensity level in decibels (dB SIL) from acoustic intensity in watts per square meter.
Sound Level Calculator
Calculate sound level intensity in decibels (dB = 10 log(I / I₀)).
Sound Wavelength Calculator
Calculate acoustic wavelength in air (λ = v_sound / f).
Specific Heat Calculator (Q = mcΔT)
Calculate heat energy needed to change a material’s temperature.
Speed & Velocity Converter
Convert km/h, mph, meters per second, and knots.
Speed Calculator
Calculate scalar speed from total distance traveled and time duration.
Speed of Sound Calculator
Calculate speed of sound in air based on ambient temperature.
Spring Constant Calculator
Calculate spring stiffness rate k in N/m.
Spring Extension Calculator
Calculate stretch or compression displacement x of spring.
Spring Force Calculator
Calculate compressive or tensile force exerted by spring.
Spring Oscillation Calculator
Calculate period of harmonic spring mass system (T = 2π √(m/k)).
Spring Potential Energy Calculator
Calculate potential energy stored in spring.
Sq Ft to Acres Converter
Convert square feet to acres.
Square Root Calculator
Calculate principal square roots sqrt(x) and nth roots of positive numbers.
Standard Deviation Calculator
Calculate sample and population standard deviation, variance and mean of a data set with step-by-step working.
Static Friction Calculator
Calculate maximum threshold force before motion occurs.
Steel Rebar Weight & Quantity Calculator
Calculate steel rebar weight per meter (d^2/162), total weight in kg/tons, and 12m rod counts.
Step-Up SIP Calculator
See how increasing your SIP by a fixed percentage every year (top-up SIP) grows your mutual fund corpus.
Stepper Motor Steps per mm Calculator
Calculate required steps per millimeter for stepper motor driven belt and lead screw linear motion systems.
Stress and Strain Calculator
Calculate axial engineering stress, strain, and Youngs modulus for structural material analysis.
Subtract Days from Date Calculator
Subtract a specific number of days from a starting date to calculate past dates.
Surveying Traverse Calculator
Calculate closed and open traverse latitude/departure adjustments and linear error of closure.
SUVAT Calculator
Solve for any missing SUVAT motion variable.
Letter T
23 toolsTangential Velocity Calculator
Calculate linear tangential velocity at radius r.
TDEE Calculator (Total Daily Energy Expenditure)
Determine your daily calorie burn based on activity level for fat loss or muscle gain.
Temperature Change Calculator
Calculate temperature differential from heat added or removed.
Temperature Converter
Convert Celsius, Fahrenheit, Kelvin, and Rankine scales.
Thermal Energy Calculator
Calculate internal thermal energy absorbed or released.
Thermal Expansion Calculator
Calculate linear, superficial area, and volumetric thermal expansion.
Thermal Linear Expansion Calculator
Calculate how much a rod, rail or pipe lengthens with temperature.
Thermal Stress Calculator
Calculate internal stress induced by thermal expansion restriction (σ = E α ΔT).
Time Addition Calculator
Add multiple time durations together in hours, minutes, and seconds.
Time Difference Calculator
Calculate exact time difference between two times in hours, minutes, and seconds.
Time Duration Calculator
Calculate total hours, minutes, and seconds between two times with cross-midnight support.
Time from Motion Calculator
Calculate elapsed motion duration.
Time Subtraction Calculator
Subtract one time duration from another in hours, minutes, and seconds.
Time Unit Converter
Convert seconds, minutes, hours, days, weeks, months, and years.
Time Zone Converter
Convert date and time between any two global IANA time zones with Daylight Saving Time accuracy.
Time Zone Difference Calculator
Calculate the hour and minute difference between any two cities or time zones.
Time Zone Jet Lag Recovery Calculator
Calculate expected circadian shift recovery days and light exposure timing based on time zones crossed.
Tip Calculator
Calculate restaurant tips, gratuity amounts, and total bills.
Torque Calculator
Calculate rotational torque force from lever arm and angle (τ = r F sin θ).
Torque Converter
Convert Newton-meters (N·m), Foot-pounds (ft-lb), and Inch-pounds (in-lb).
Travel Safety & Emergency Fund Calculator
Determine recommended emergency cash reserve buffer for unexpected travel disruptions, flight rebookings, or medical needs.
Travel Speed, Distance & Time Calculator
Solve for travel time, average travel speed, or distance covered across any transport mode.
Triangle Area Calculator (Heron’s Formula)
Calculate the area and perimeter of any triangle from its three sides using Heron’s formula.
Letter U
8 toolsU.S. Navy Body Fat Calculator
Estimate body fat percentage using U.S. Navy anthropometric waist, neck, and hip measurements.
Unit Price & Grocery Comparison Calculator
Compare product packaging deals to find the true lowest cost per unit, gram, or fluid ounce.
Unit Vector Calculator
Calculate normalized direction unit vector u = V / |V|.
Universal Physics Solver
Solve physics equations for force, motion, work, energy, thermodynamics, and gravity step by step.
Unix Timestamp to Date
Convert Unix epoch timestamps back into readable UTC and local dates.
UTC Converter
Convert Coordinated Universal Time (UTC) to any local time zone and vice versa.
UTC Offset Calculator
Find current and date-specific UTC offsets for any city or region worldwide.
UTM to Lat/Long Converter
Convert Universal Transverse Mercator (UTM) zone, Easting, and Northing coordinates back to geographic latitude and longitude.
Letter V
17 toolsVacation Rental vs Hotel Cost Calculator
Compare true total cost of vacation rentals (Airbnb/VRBO) versus traditional hotels including hidden fees and food savings.
Vector Addition Calculator
Calculate resultant vector sum from components.
Vector Angle Calculator
Calculate angle θ in degrees between two 2D or 3D vectors.
Vector Components Calculator
Decompose vector magnitude and angle into orthogonal (Vx, Vy) components.
Vector Magnitude Calculator
Calculate length or magnitude of 2D or 3D vector.
Vector Projection Calculator
Calculate orthogonal vector projection of A onto B.
Vector Subtraction Calculator
Calculate vector difference A - B.
Velocity Calculator
Calculate velocity from displacement and elapsed time.
Vertical Motion Calculator
Calculate vertical trajectory height and flight time under Earth gravity.
Vincenty Distance Calculator
Calculate high-precision ellipsoidal geodesic distance on the WGS-84 ellipsoid using Vincenty inverse algorithm.
Voltage Calculator
Calculate potential difference voltage V = I R.
Voltage Divider Calculator
Calculate the output voltage of a two-resistor divider.
Voltage Drop Calculator
Calculate voltage drop in a copper or aluminium cable run for single-phase/DC or three-phase circuits.
Volume & Capacity Converter
Convert liters, gallons, cubic meters, fluid ounces, cups, and liquid volumes.
Volume Density Calculator
Calculate mass contained in specific volumetric space.
Volume Expansion Calculator
Calculate volumetric expansion of liquids or solids.
Volumetric Flow Rate Calculator
Calculate volume of fluid passing per second (m³/s or GPM).
Letter W
18 toolsWall Paint & Primer Calculator
Calculate paint liters, primer, and wall putty required for room interior and exterior painting.
Wave Amplitude Calculator
Calculate maximum displacement of wave from equilibrium position.
Wave Frequency Calculator
Calculate wave frequency in Hertz from speed and wavelength.
Wave Number Calculator
Calculate spatial frequency wavenumber (k = 2π / λ).
Wave Period Calculator
Calculate time for one wave cycle (T = 1/f).
Wave Speed Calculator (v = fλ)
Solve the wave equation for speed, frequency or wavelength.
Wavelength Calculator
Calculate distance between wave crests (λ = v / f).
Week Number Calculator
Determine the ISO 8601 week number (1 through 53) and week year for any selected date.
Weight Calculator
Calculate downward force of gravity on a mass (W = mg).
Weight from Gravity Calculator
Calculate local weight W = m g on celestial bodies.
Weight Loss Percentage Calculator
Calculate total weight loss percentage, remaining target weight, and weekly progress rate.
Weighted Average Calculator
Calculate the weighted mean of data values with varying relative weights or importance.
Weighted Grade Calculator
Calculate your course grade from assignment, quiz and exam scores and their weights.
Work Calculator (W = Fd cosθ)
Calculate mechanical work from force, displacement and the angle between them.
Work Rate Calculator
Calculate output energy transfer rate over operational timeframe.
Working Days Calculator
Calculate total working days (Monday through Friday) excluding weekends between two dates.
World Clock
Real time global world clock with digital and analog displays, IANA time zones, and country flags.
World Weather & Location Finder
Live global weather forecasts, real time digital & analog IANA clocks, and geodesic city distances with GPS location detection.