Time & Date Calculators
Count days between dates, business days, exact ages, and elapsed time — with leap years handled for you.
- Calculators
- 6
- Cost
- Free
- Sign-up
- None
Time & Date calculators
Age Calculator
Enter any birth date to get the exact age in years, months, and days, with leap years handled correctly.
Date Difference Calculator
Find exactly how many days, weeks, months, and years lie between any two calendar dates.
Working Days Calculator
Count working days between two dates, excluding weekends and the public holidays you specify.
Time Duration Calculator
Enter a start and end date-time to get the exact elapsed time in days, hours, minutes, and seconds.
Work Hours Calculator
Add your start time, end time, and break minutes to get total hours worked — including overnight shifts.
Timezone Converter
Convert a date and time between any two time zones, with daylight saving applied for the exact date.
About these time & date calculators
Calendar maths is surprisingly easy to get wrong: months have different lengths, leap years add a day, and business-day counts depend on weekends and holidays. These tools handle those edge cases so you get an exact count.
Use them for notice periods, delivery estimates, project timelines, eligibility checks, SLAs, and countdowns. Each page explains whether the start and end dates are included, so the result matches how your contract or schedule counts days.
Tips for accurate results
- Calendar days vs. business days. Use Date Difference for the full calendar gap and Working Days when weekends and holidays should not count.
- Inclusive counting. Bookings and some contracts count both the start and end date. Add one day to a date-difference result when that applies.
- Keep one time zone. For hour-level durations, enter both times in the same time zone to avoid an offset error.
FAQ
Time & Date calculator questions
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