Add and subtract hours and minutes
Type one duration per line. Put a minus sign in front of a line to subtract it.
Result
3:54:30Total (h:min:s)
- In decimal hours
- 3.91
- In minutes
- 234.5
- Durations added
- 4:15:00
- Durations subtracted
- 0:20:30
- This is a length of time, not a time of day: it can be more than 24 hours.
Inputs
- Durations (one per line)
- 1:30 2h45 -0:20:30
How it is calculated
Each line is turned into seconds (1 h = 3,600 s, 1 min = 60 s).
Result
Total (h:min:s)
- In decimal hours
- 3.91
- In minutes
- 234.5
- Durations added
- 4:15:00
How it is calculated
- Each line is turned into seconds (1 h = 3,600 s, 1 min = 60 s).
- We add the lines and subtract the ones that start with “-”.
- The total is turned back into hours, minutes and seconds.
Example
1:30 + 2h45 − 0:20:30 = 3:54:30, which is 3.91 hours.
Good to know
- Seconds are whole numbers.
- For an arrival time, use the time between two times tool instead.
Frequently asked questions
What is this tool used for?
Type one duration per line. Put a minus sign in front of a line to subtract it.
How is the result calculated?
Each line is turned into seconds (1 h = 3,600 s, 1 min = 60 s).
What should I check before using the result?
Seconds are whole numbers.