Frame rate converter
Footage shot at one frame rate often has to be delivered at another — film at 24 fps for an NTSC broadcast at 29.97, or a PAL clip at 25 fps for an online target. This converter compares two frame rates, shows the rate ratio, and recalculates a frame count so a clip keeps the same real-time duration at the new rate.
How it works
Given a source and target frame rate, the tool computes the ratio (target ÷ source). To re-express a frame count at the new rate while preserving duration, it first finds the clip’s length in seconds — frames ÷ source fps — then multiplies by the target fps:
new frames = (frames ÷ source fps) × target fps
It also surfaces the NTSC quirk: 23.976 vs 24, and 29.97 vs 30, differ by exactly the 1000/1001 pulldown factor, which is why those rates look almost — but not quite — like whole numbers.
Example
A clip of 240 frames at 24 fps lasts 240 ÷ 24 = 10 seconds. Converting to 30 fps for the same duration: 10 × 30 = 300 frames. The rate ratio is 30 ÷ 24 = 1.25.
| Source fps | Target fps | Ratio |
|---|---|---|
| 24 | 30 | 1.25 |
| 24 | 23.976 | 0.999 (1000/1001) |
| 30 | 29.97 | 0.999 (1000/1001) |
| 25 | 30 | 1.2 |
Enter your rates and the answer updates instantly — all in your browser, nothing uploaded.