Time tools
8 free time tools · Count days, add up hours and compare time zones
Use Days between dates for calendar days or working days, Duration for a gap between clock times, and Time zone converter to compare clocks in different places. Check whether the first or last date counts and which holidays apply. Countdown and Duration interpret entered times as UTC; a local deadline may need a time-zone conversion first.
All time tools
- Days between dates Count days and optional business days between two dates.
- Age calculator Exact age in years, months and days, plus next birthday.
- Add days to date Add or subtract days, weeks, months or years.
- Time zone converter Compare current times and dates across several time zones.
- Date countdown Count down to a date and time entered in UTC.
- Duration calculator Find the gap between two dates and times, in days, hours or minutes.
- Week number ISO and US week numbers for any date.
- Timesheet calculator Add up worked hours with breaks and overnight shifts.
Guides for these tasks
- Business days vs calendar days: work out which dates count Count a delivery or response window, check whether the starting day counts, and choose the right weekends and holidays for a business-day calculation.
- What adding a month means for month-end dates Check month-end offsets, understand clamping and rollover, and keep recurring dates from drifting after February.
- Week numbers explained: turn a week reference into a date range Identify an ISO week and its week-year, compare Sunday-start numbering, and avoid reporting errors around New Year and week 53.
- Time zone conversion: use the date as well as the city Convert a meeting time for its actual date, check daylight-saving gaps and repeated hours, and distinguish a named time zone from a fixed UTC offset.
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