Duration Calculator
Lengths of time, not dates. Add up a list of them, take one away from another, split one into parts, and see the answer as a clock, as words, as decimal hours or as timecode.
Add up a list
One per line. 1:23:45, 4:05, 90m, 1h 30m, 1.5h and 75 all work. Anything after a # is treated as a label.
A bare number means
Total
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Two durations
The second box takes a plain number when you multiply or divide.
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One duration, every way
Line by line