Time, Date & Timezone Calculators
World clock, time zone converters, business days, duration calculators, and calendar math.
Age Calculator
Calculate your exact age in years, months, days, total weeks, and next birthday countdown.
Exact Age Calculator
Calculate precise chronological age down to total days, weeks, hours, and minutes.
Date Difference Calculator
Calculate the total time difference between any two calendar dates with inclusive or exclusive options.
Days Between Dates Calculator
Calculate the exact number of days between two dates.
Days Until Date Calculator
Calculate how many days remain until a future target date or milestone event.
Add Days to Date Calculator
Add a specific number of days, weeks, or months to a starting date to find the future date.
Subtract Days from Date Calculator
Subtract a specific number of days from a starting date to calculate past dates.
Working Days Calculator
Calculate total working days (Monday through Friday) excluding weekends between two dates.
Business Days Calculator
Calculate business days between dates excluding weekends with configurable weekend schedules.
Day of Week Calculator
Find the exact day of the week (Monday through Sunday) for any historical or future date.
Week Number Calculator
Determine the ISO 8601 week number (1 through 53) and week year for any selected date.
Leap Year Calculator
Determine whether any year is a leap year and view next and previous leap years.
Days in Month Calculator
Calculate the total number of days in any month for any year with leap year awareness.
Date to Unix Timestamp
Convert any human readable date and time into Unix epoch timestamps in seconds or milliseconds.
Unix Timestamp to Date
Convert Unix epoch timestamps back into readable UTC and local dates.
Time Duration Calculator
Calculate total hours, minutes, and seconds between two times with cross-midnight support.
Time Difference Calculator
Calculate exact time difference between two times in hours, minutes, and seconds.
Hours Calculator
Add, subtract, and total hours and minutes for timesheets and payroll.
Minutes Calculator
Add and subtract minutes and seconds with automatic hours conversion.
Seconds Calculator
Calculate total seconds and convert into minutes, hours, and days.
Time Addition Calculator
Add multiple time durations together in hours, minutes, and seconds.
Time Subtraction Calculator
Subtract one time duration from another in hours, minutes, and seconds.
Decimal Hours Calculator
Convert between hours and minutes format (HH:MM) and decimal hours format (e.g. 7:30 to 7.5).
Hours to Minutes Calculator
Convert hours (including decimal hours) into total minutes.
Minutes to Hours Calculator
Convert total minutes into formatted hours, minutes, and decimal hours.
Minutes to Seconds Calculator
Convert minutes into total seconds.
Seconds to Minutes Calculator
Convert total seconds into minutes and remaining seconds.
World Clock
Real time global world clock with digital and analog displays, IANA time zones, and country flags.
Time Zone Converter
Convert date and time between any two global IANA time zones with Daylight Saving Time accuracy.
Meeting Time Finder
Find overlapping working hours across multiple global cities to schedule international meetings.
Time Zone Difference Calculator
Calculate the hour and minute difference between any two cities or time zones.
UTC Converter
Convert Coordinated Universal Time (UTC) to any local time zone and vice versa.
GMT to UTC Converter
Convert between Greenwich Mean Time (GMT) and Coordinated Universal Time (UTC) with historical explanations.
UTC Offset Calculator
Find current and date-specific UTC offsets for any city or region worldwide.
World Weather & Location Finder
Live global weather forecasts, real time digital & analog IANA clocks, and geodesic city distances with GPS location detection.