Time Calculator
Two calculations: how long it is between two times (wrapping past midnight), and what you get when you add or subtract hours and minutes from a date and time.
Time between two times
8 hours 30 minutes
Add or subtract time
Enter a date and time.
Time calculator FAQ
How do I calculate the time between two times?
Enter the start and end time. If the end is earlier than the start, the calculator wraps past midnight: 10:00 PM to 6:00 AM is 8 hours, not minus 16.
Can I add hours across a date boundary?
Yes. Pick a date and time, enter the hours and minutes to add or subtract, and the result shows the new time with its weekday and date.
Updated 6 November 2026. Time zone data: IANA tz database.