Time & Date Calculators
Add and subtract time, count days between dates, calculate age, work hours and time zones.
18 calculators
- Add Times CalculatorAdd up a list of times or durations in h:mm or h:mm:ss format. Get the total in hours and minutes, decimal hou
- Age CalculatorCalculate exact age in years, months and days from a date of birth, plus total weeks and days lived and a coun
- Business Days CalculatorCount business days between two dates or add working days to a date, skipping weekends and, optionally, the 11
- Date CalculatorAdd or subtract days, weeks, months and years to or from any date. See the resulting date, its weekday and the
- Day of the Week CalculatorFind what day of the week any date falls on, past or future, plus the day of the year, ISO week number, quarte
- Days Between Dates CalculatorCount the days between two dates, with the result also shown in weeks, months and years, weekdays versus weeke
- Days Until CalculatorCount down the days until a birthday, holiday, vacation or deadline. Shows days, weeks, months, weekdays and h
- Decimal Hours CalculatorConvert hours and minutes to decimal hours for payroll and invoices, or convert decimal hours back to hours, m
- Half Birthday CalculatorFind your half birthday six months after your birthday, the next date it falls on, how many days away it is, a
- Hours CalculatorCalculate the hours and minutes between a start and end time, subtract an unpaid break, handle overnight shift
- Leap Year CalculatorCheck whether any year is a leap year using the Gregorian rules, see the previous and next leap years, and cou
- Military Time ConverterConvert standard 12-hour AM/PM time to 24-hour military time and back, and see how each time is spoken, such a
- Time CalculatorAdd or subtract two time durations in days, hours, minutes and seconds. Get the result as d:h:m:s, decimal hou
- Time Card CalculatorEnter clock-in and clock-out times for each day of the week to total hours worked, overtime over 40 hours, and
- Time Duration CalculatorFind the exact duration between two dates and times in days, hours, minutes and seconds, with totals in hours,
- Time Zone ConverterConvert a date and time from one UTC offset to another, such as Eastern Time to India or London, and see the t
- Unix Timestamp ConverterConvert a Unix epoch timestamp in seconds or milliseconds to a readable UTC date and time, or turn any date an
- Week Number CalculatorFind the ISO 8601 week number for any date, the Monday-to-Sunday dates of that week, and the US-style week num