Duration Sum Calculator

One duration per line—total length in seconds, clock time, and decimal hours

Paste durations

Formats: MM:SS, H:MM:SS, or a single number = seconds

Lines starting with # are ignored.

FAQ

Why might my total differ from my NLE?

Editing apps may use drop-frame timecode, frame rounding, or different parsers. This page sums wall-clock style durations you paste line by line.

Why might my total differ from my NLE?

Editing apps may use drop-frame timecode, frame rounding, or different parsers. This page sums wall-clock style durations you paste line by line.