⏱️ Time Duration Calculator
Add or subtract hours and minutes.
About this tool
Adds or subtracts two durations expressed in hours and minutes — handy for timesheets, cooking, or stacking up multiple time blocks in your day.
Working across clock times in different regions instead of raw durations? The Time Zone Converter handles that conversion.
Worked example
Add 2 hours 45 minutes of one task to 1 hour 30 minutes of another and you get 4 hours 15 minutes total — the calculator carries over the minutes automatically so you don't have to.
How to use it
- Enter the first duration in hours and minutes.
- Enter the second duration.
- Choose add or subtract and press Calculate.
Tips
- Minutes over 60 are handled automatically — no need to convert first.
- For clock times (like 9:15 AM to 5:45 PM) rather than raw durations, see the Date Difference Calculator or Time Zone Converter.
- Useful for stacking task estimates when planning a work day.
FAQ
Can I subtract a larger duration from a smaller one?
The calculator will show a negative result if the second duration is longer.
Does this handle seconds?
No, this tool works in hours and minutes only.
Is this the same as a timesheet calculator?
Similar concept, but this is for two durations at a time rather than tracking clock-in and clock-out times.