Working with time DURATION, not time of day

Question

I\'m doing some benchmarking, and I want to use Excel to produce graphs of the results. I\'ve got a simple but annoying problem which is baking my noodle.

The proble

Answer 1

What I wound up doing was: Put time duration in by hand, e.g. 1 min, 03 sec. Simple but effective. It seems Excel overwrote everything else, even when I used the 'custom format' given in some answers.