Time & Date Calculators

Time Duration CalculatorHours and minutes between two times. Time Addition CalculatorAdd or subtract hours, minutes and seconds. Elapsed Time CalculatorTime passed between two date-times, or since a moment. Average Time CalculatorAverage lap times, durations or clock times. Hours CalculatorHours worked between two times, minus breaks. Speech Time CalculatorHow long your speech takes to say out loud. Pace CalculatorRunning pace, finish time or distance, with splits. Sleep CalculatorBedtimes and wake-up times in 90-minute cycles.

Time Card CalculatorWeekly timesheet with breaks, overtime and pay. Overtime CalculatorOvertime hours and pay at 1.5× or 2×. Time and a Half CalculatorYour rate at 1.5× and 2×, and pay for any hours.

Time ConverterConvert ms, seconds, minutes, hours, days, years. Time to DecimalHours and minutes to decimal hours. Decimal to TimeDecimal hours to hours, minutes and seconds. Minutes to HoursConvert minutes to hours and minutes. Hours to MinutesConvert hours (decimal or h:mm) to minutes. Seconds to HoursConvert seconds to h:mm:ss and decimal hours. Military Time Converter24-hour military time chart and converter. Epoch ConverterUnix timestamp to date and back, live. Roman Numerals ConverterNumbers and years to Roman numerals and back.

Days Until DateCount the days, weeks, and hours to any date. Days Since CalculatorHow many days have passed since a date. Date Difference CalculatorYears, months, and days between two dates. Business Days CalculatorWorking days between dates, minus US holidays. Days Left in the YearLive count of the days remaining this year. Days Passed in the YearToday's day number and how much of the year is gone. Week of the YearToday's ISO week number and a full week list. Today's Julian DateOrdinal date (YYDDD) and astronomical Julian Day.

Age CalculatorExact age in years, months, days, and more. Age Difference CalculatorThe age gap between two people, to the day. Half Birthday CalculatorWhen your half birthday is and how long until it. Anniversary CalculatorTime together, next anniversary, and milestones. Life in WeeksYour life as a grid of weeks, one square each.