Time duration
The math stays in this tab. Nothing is uploaded.
Duration
How to use this tool
Add or subtract two lengths of time in this tab. Nothing is uploaded.
Open Time duration
1:30:00 plus 0:45:00 is already filled. The sum is 2:15:00.
Switch to subtract
Subtract takes the second duration off the first. A longer second time gives a negative result.
Copy the duration
Copy puts the H:MM:SS result and the total seconds on the clipboard.
FAQ
Can I add hours and minutes here?
Yes. Enter two durations as hours:minutes:seconds. Add them, or subtract the second from the first.
Is this uploaded?
No. The math stays in this tab.
What format do the times use?
Use H:MM:SS, such as 1:30:00. Minutes and seconds must be from 0 to 59.
What if the second time is longer?
Subtracting a longer duration gives a negative result, such as -0:15:00. This is a length of time, not a clock or a time zone.
Can I copy the result?
Yes. Copy puts the duration and the total seconds on the clipboard.