Timecode Calculator: Duration Between Two Timecodes

What it is for on a rythmo band. A rythmo band is a scrolling dubbing script synced to your video, and the length of each line decides whether your adapted text fits. This calculator gives you the exact duration between the start and the end of a line, so you can adjust the timings without doing the math in your head.

How long is this loop? Where does a line that starts at 00:12:04:10 and lasts 3 seconds 12 frames end? These questions come up constantly when you prepare a dub, and doing them in your head is a classic source of mistakes, because frames do not count in base 10: at 25 fps, 00:00:00:24 plus one frame is 00:00:01:00.

This timecode calculator finds the duration between two timecodes and lets you add or subtract timecodes at 24, 25 or 30 fps. The result is shown as timecode, as a frame count and in seconds. Use it to measure the length of a line so you can fit the adapted text, to cut a film into evenly sized loops, or to check that a recording fits in the time available.

Everything happens in your browser: no file is ever sent to a server.