Calculate slow-motion
output duration by fps.
Source fps + target fps + clip length = output duration and slow-mo factor. Interpolation warning included when upconverting.
Frame Rate Calculator
FREESource frame rate
Target frame rate
Clip duration
Output duration
25.0s
60 fps → 24 fps
Slow-mo factor
2.50×
Total frames
600
Each source frame is held for 2.50 output frames — the clip runs slower.
All calculations run locally. Nothing is sent anywhere.
How Frame Rate Calculator works
Enter source and target frame rate
Pick from common presets or type any fps value. The calculator handles non-integer rates like 23.976.
Set clip duration
Enter the original clip length in minutes and seconds.
Read the result
See the output duration, slow-mo factor, total frame count, and whether frame interpolation is required.
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