Clock arithmetic
Subtract Hours from a Time
Subtract hours and minutes from a clock time, including results that cross into the previous day.
Clock result06:30Subtracted 2 hr 30 min
How this calculator works
The calculator subtracts the entered duration in minutes and normalizes the result to the 24-hour clock.
The tool is arithmetic only. Where legal, payroll, holiday, timezone or jurisdiction-specific rules matter, the page states what is and is not included.
Frequently asked questions
Can the result go into the previous day?
Yes. For clock arithmetic, 01:00 minus 3 hours becomes 22:00.