Frame Rate Conform Calculator
Conform a clip from one frame rate to another and see the new running time, the speed change and what happens to the audio.
A speed conform keeps every frame and plays them at the new rate: the ratio is target ÷ source, so 24 → 25 fps runs 4.17% faster and a 60.000 s clip becomes 57.600 s. Audio left untouched shifts by 12 × log₂(target ÷ source) semitones. The second set of figures is for a same-length conform, which duplicates frames when the target rate is higher and drops them when it is lower. Frame counts are rounded to whole frames, which matters for very short clips. Frame rates are limited to 1–240 fps and duration to 0.1–86,400 s, and the clip must contain at least one whole frame at the source rate; drop-frame timecode, interlaced field order and 3:2 pulldown are not modelled. Everything runs locally in your browser.