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Film & Video Production Calculators

Frame Rate Converter

How a clip’s duration and frame count change when converted between frame rates.

Enter values

Results update as you type.

Result

New duration

57.6 s

The classic 24 → 25 fps PAL speed-up runs 4% fast and lifts the audio pitch by about 71 cents unless corrected.

Source frames
1,440
Target frames
1,440
Speed change
0.96 ×
Duration change
-4%
Audio pitch shift
70.7 cents
Conversion type
Sped up

About the Frame Rate Converter

How a clip’s duration and frame count change when converted between frame rates.

Also known as: fps converter, pal ntsc conversion, frame rate conversion, speed change calculator.

How to use this calculator

  1. Enter clip duration, source frame rate, target frame rate, method.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

retimed duration = source frames ÷ target frame rate

Worked example

Using the values pre-filled in the calculator above:

  • Clip duration = 60 seconds
  • Source frame rate: 24
  • Target frame rate: 25 (PAL)
  • Method: Retime (speed changes)

the calculator returns:

  • New duration: 57.6 s
  • Source frames: 1,440
  • Target frames: 1,440
  • Speed change: 0.96 ×