Add Time Calculator
Add or subtract hours, minutes, and seconds. Perfect for totalling work hours, calculating durations, and time tracking.
Part of our Date & Time Calculators collection.
Add Time Calculator
Free online calculator
How to Use This Calculator
- 1
Enter the first time in hours, minutes, seconds.
- 2
Select Add or Subtract.
- 3
Enter the second time.
- 4
See the result instantly.
How Time Addition Works
Convert both times to seconds, apply operation, convert back. Total seconds → hours = floor(s/3600), minutes = floor((s%3600)/60), seconds = s%60
Example Calculation
Example: 2h 30m + 1h 45m
Inputs
time1H: 2time1M: 30operation: addtime2H: 1time2M: 45
Result
4h 15m 00s
150 min + 105 min = 255 min = 4h 15m.
Frequently Asked Questions
Can I add more than two times?
Run the calculator twice — add the first pair, then add the result to the third duration.