Age and Birthday Calculator
Calculate an exact age, total days alive and the time remaining until the next birthday from a date of birth.
Date & time toolsOpenDate & time tools
Date and time calculators
Calculate ages, date differences, working time, countdowns, time zones and recurring schedules.
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Date Difference Calculator
years, months, weeks, days, hours and minutes between dates.
Date & time toolsOpenAdd or Subtract Date Calculator
Add or subtract days, weeks, months or years from a chosen date and see the resulting calendar date instantly.
Date & time toolsOpenBusiness Days Calculator
Count weekdays between two dates and optionally exclude weekends or supplied holiday dates from the total.
Date & time toolsOpenDate Countdown Calculator
Calculate the days, hours, minutes and seconds remaining until a selected future date and time.
Date & time toolsOpenDay of the Week Calculator
Enter any valid calendar date to identify the weekday it falls on and review the formatted date.
Date & time toolsOpenWeek Number Calculator
Find the ISO week number and ISO week-year for any selected calendar date.
Date & time toolsOpenLeap Year Checker
Use leap year checker directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenTime Duration Calculator
Calculate the duration between two clock times, including shifts that continue past midnight.
Date & time toolsOpenTime Addition and Subtraction Calculator
Use time addition and subtraction calculator directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenWorld Clock
Use world clock directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenTime Zone Converter
Use time zone converter directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenMeeting Time Planner
Compare working hours across selected time zones to find practical overlapping times for an international meeting.
Date & time toolsOpenUnix Timestamp Converter
Use unix timestamp converter directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenHours Worked Calculator
Use hours worked calculator directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenTimesheet Calculator
Use timesheet calculator directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenShift Planner
Use shift planner directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenOvertime Hours Calculator
Use overtime hours calculator directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenSleep and Wake-Up Calculator
Use sleep and wake-up calculator directly in your browser with clear inputs and an exportable result.
Date & time toolsOpenRecurring Date Generator
Generate a reusable sequence of weekly, monthly or yearly dates from a selected starting date.
Date & time toolsOpen