Time & Age Calculators

A complete collection of free time and age calculators — convert military time, calculate work hours and time cards, find your exact age, and more. Every tool runs instantly in your browser.

Tools

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Pick any calculator below to get started.

Chronological Age Calculator

Calculate exact chronological age in years, months, and days from a date of birth.

Time Sheet Calculator

Calculate work hours and pay from clock in and clock out times, handling breaks and overnight shifts.

Military Time Converter

Convert between 12-hour AM/PM and 24-hour military time formats instantly.

Time Calculator

Add or subtract two times in HH:MM format and get the exact result in hours, minutes, and decimal hours.

Hours Calculator

Free hours calculator. Find the total hours and minutes between a start and end time, with overnight shift support and decimal hours for payroll.

Hour Calculator

Free hour calculator. Add two times in hours and minutes and get a combined total in HH:MM and decimal hours for timesheets, payroll, and billing.

Time Card Calculator

Free time card calculator. Turn clock in and clock out punches into total work hours and gross pay, handling breaks and overnight shifts.

Time Clock Calculator

Free time clock calculator. Turn clock in and clock out punches into net work hours after subtracting an unpaid lunch, with overnight shift support.

Clock Calculator

Free clock calculator. Add or subtract clock times that wrap past midnight, and convert between 12-hour AM/PM and 24-hour military time instantly.

Timesheet Calculator

Free timesheet calculator. Add clock in, clock out, and break for each day to get daily decimal hours and a total weekly hours figure for payroll.

Birthday Calculator

Free birthday calculator. Find the day of the week you were born, your exact age, total days alive, and the countdown to your next birthday.

Height Calculator

Free height calculator. Predict a child's adult height from the parents' heights using the mid-parental method, with a predicted value and likely range.

Age Calculator

Free age calculator. Find your exact age in years, months, and days from your date of birth, plus total months, weeks, days, and hours lived.

FAQ

Common Questions

Answers to frequent questions about this collection of tools.