Date & Time Calculators
Count the days between two dates, work out an exact age, add up hours on a time card, or find the weekday and ISO week number for any date.
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9 toolsAge Calculator
Find calendar age, elapsed days and months, and the next birthday’s date and weekday.
Open calculatorBusiness Days Calculator
Count, add or subtract business days with chosen working weekdays and your closure dates. Set interval endpoints, or move from a start date treated as day zero.
Open calculatorDate Difference Calculator
Compare two dates in either order, or require a forward interval. See calendar duration, total days, weekdays and equivalent time units, with explicit endpoint counting.
Open calculatorDay of the Week Calculator
Find the weekday, day of year and ISO week date for a Gregorian date. Choose a day from the month calendar, move between months or jump to today.
Open calculatorDecimal Hours Calculator
Convert durations between hours, minutes, seconds, and decimal hours for timesheets.
Open calculatorISO Week Calculator
Find a date’s ISO week number, week year, and Monday-to-Sunday range.
Open calculatorTime Addition Calculator
Add several elapsed durations, or add or subtract a duration from a clock time.
Open calculatorTime Card Calculator
Total a seven-day timesheet with unpaid breaks, overnight shifts, and an optional gross-pay estimate.
Open calculatorTime Duration Calculator
Find time between clock readings or dated endpoints and subtract an optional break.
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