Mathematics Calculators
Basic math, algebra, geometry, statistics, percentages, and number conversions.
The mathematics calculators cover everyday arithmetic such as percentages, fractions and rounding, along with algebra, geometry, number theory and probability. Each tool shows the formula it uses, so you can check the working by hand instead of relying on a bare number.
Many of these pages include a worked example and short notes on common mistakes, for example confusing percentage change with percentage points, or forgetting that the order of choices matters for permutations but not for combinations. They suit homework checks, exam revision and quick calculations at work.
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number instantly.
Percentage Increase Calculator
Calculate the percentage growth or increase from an initial value to a final 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 Change Calculator
Calculate the percentage change (increase or decrease) between an old value and a new value.
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.
Proportion Calculator
Solve direct and inverse proportions to find missing variable values.
Average Calculator
Calculate the arithmetic mean, sum, count, and statistical summary of a dataset.
Weighted Average Calculator
Calculate the weighted mean of data values with varying relative weights or importance.
Median Calculator
Find the exact middle number of a sorted set of numbers.
Mode Calculator
Find the most frequently occurring value or values in a set of numbers.
Range Calculator
Calculate the statistical range, minimum value, and maximum value of a dataset.
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.
Decimal to Fraction Calculator
Convert terminating or repeating decimals into exact simplified fractions.
Fraction to Decimal Calculator
Convert fractions and mixed numbers into exact decimal values and percentages.
LCM Calculator (Least Common Multiple)
Find the least common multiple (LCM) of two or more numbers.
GCD Calculator (Greatest Common Divisor)
Calculate the greatest common divisor (GCD) or highest common factor (HCF) of numbers.
Prime Number Checker
Check whether a number is prime or composite and list its divisors.
Prime Factorization Calculator
Decompose any integer into its unique prime factor product tree.
Exponent Calculator
Calculate powers, exponents, base raised to power x^y, and scientific exponentiation.
Square Root Calculator
Calculate principal square roots sqrt(x) and nth roots of positive numbers.
Cube Root Calculator
Calculate real cube roots cbrt(x) for positive and negative numbers.
Scientific Notation Calculator
Convert numbers into standard scientific notation (a * 10^b) and engineering notation.
Rounding Calculator
Round numbers to nearest integer, decimal place, significant figures, or nearest fraction.
Random Number Generator
Generate uniform random integers or decimals within a custom minimum and maximum range.
Probability Calculator
Calculate single event probability, compound event probability, and odds ratios.
Permutation Calculator
Calculate nPr permutations where item order matters.
Combination Calculator
Calculate nCr combinations where item order does not matter.
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.
Percentage of Marks Calculator
Find your exam percentage from marks obtained and total marks.
SGPA to CGPA Calculator
Combine semester SGPAs into a cumulative CGPA, weighted by credits if you have them.
Quadratic Equation Solver
Solve ax² + bx + c = 0 for real or complex roots, with the discriminant, vertex and full step-by-step working.
Standard Deviation Calculator
Calculate sample and population standard deviation, variance and mean of a data set with step-by-step working.
Pythagorean Theorem Calculator
Find the hypotenuse or a missing leg of a right triangle using a² + b² = c².
Triangle Area Calculator (Heron’s Formula)
Calculate the area and perimeter of any triangle from its three sides using Heron’s formula.
Circle Calculator (Area, Circumference)
Enter a radius, diameter, circumference or area and get every other circle measurement.
Logarithm Calculator (Any Base)
Compute log of any number to any base, plus natural log, log₁₀ and log₂, using the change-of-base rule.
Z-Score Calculator (with Probability)
Convert a value to a z-score and find left-tail, right-tail and two-tailed normal probabilities.
Slope Calculator (Two Points)
Find the slope, line equation, distance and angle between two points.
Weighted Grade Calculator
Calculate your course grade from assignment, quiz and exam scores and their weights.
Final Exam Grade Calculator
Find the score you need on your final exam to reach a target course grade.
GPA Calculator (4.0 Scale)
Calculate your credit-weighted GPA on the standard US 4.0 scale from letter grades and credits.