Short user manual
Calculate time, add or subtract days, and include durations.
Find the difference between two dates and times. Split into days, hours, minutes, and seconds. Add or subtract periods of time from the original date. Or combine multiple time entries without manually converting units.
Highlights of this tool
- Calculate time intervals across days and years.
- Can separate working hours from Monday to Friday.
- Includes positive and negative entries for multiple time periods.
How to use Time Calculator
- 1Select interval mode, increase, decrease, or combine time.
- 2Fill in the desired date, time, and duration.
- 3Press calculate and copy the results to use.
Frequently asked questions
Can you calculate the time past midnight?
Yes, select the end date to be the next day. The system will display the total time period.
What time zone is used?
The tool references the time zone set on your device and browser.