About this time calculator
A time calculator avoids mistakes when totaling timesheets, video lengths, or workout intervals.
How to use
- Choose add or subtract.
- Enter two durations.
- Read the result in hours, minutes, seconds.
Formula
Convert both times to seconds, add or subtract, then convert back.
Worked examples
Example: 2h 30m + 1h 45m = 4h 15m.
Tips
- Use decimal hours mode on the Hours converter for payroll tools that need 1.5 instead of 1:30.
Frequently asked questions
How do I add hours and minutes?
Add minutes first; if minutes reach 60, carry 1 hour. Or use this calculator for exact totals.