Time & Date calculators
Explore all 25 calculators in the Time & Date category — available now, fast and free.
≣Available now 25
About Time & Date calculators
Date and time calculators answer the practical questions: how many days between two dates, your exact age, working days in a period, countdowns to an event, week numbers and time-zone differences. Add or subtract days and hours with holidays taken into account.
Frequently asked questions
How do I count the days between two dates?
Enter the start and end date and the calculator returns the number of days, and optionally only working days by skipping weekends and public holidays.
How do I count only the working days between two dates?
Enter the two dates and the calculator subtracts weekends and public holidays, returning the number of working (business) days — useful for deadlines and leave.
How is exact age calculated?
Exact age is the time from your birth date to today expressed in years, months and days, adjusting for month lengths and leap years.
How do I add or subtract days from a date?
Enter a start date and a number of days to add or subtract, and the calculator returns the resulting date, rolling over months and years correctly.
What week number is it?
The ISO week number counts weeks from the first week containing a Thursday, so it runs from 1 to 52 or 53; the calculator returns the week for any date.