Date & Time Calculators
Age, date difference, workdays, countdown, time zones, and sleep schedules.
14 tools
- Age Calculator Exact age in years, months, and days from date of birth.
- Average Calculator Average (mean) of a number list.
- Countdown / Days Until Calculator Days, hours, and weeks until a target date.
- Date Calculator Add or subtract days from a date, or difference between dates.
- Day Counter Count days between two dates.
- Day of the Week Calculator Weekday for any date.
- Hours Calculator Hours between two clock times.
- Sleep Calculator Wake times based on 90-minute cycles.
- Time Calculator Add or subtract hours and minutes.
- Time Card Calculator Hours worked from in/out times.
- Time Duration Calculator Duration between two times.
- Time Zone Calculator Hour offset conversion between zones.
- Timezone Meeting Planner Find overlapping clock hours for two UTC offsets.
- Workdays / Business Days Calculator Count weekdays between two dates (Mon–Fri).