Frame-Rate Conversion Duration Calculator
Conform footage from one frame rate to another and see the new runtime and speed change — including the classic PAL 25→24 speed-up.
Playing 24 fps film at 25 fps (classic PAL speed-up) runs it 4.17% faster — a 100-minute film finishes in 96 minutes and the pitch rises a semitone unless corrected. This is frame-for-frame conform (no frame blending); for matched-duration conversion you'd retime with optical flow instead.
Rule / Formula
Conform footage from one frame rate to another and see the new runtime and speed change — including the classic PAL 25→24 speed-up.
About Frame-Rate Conversion Duration Calculator
Conform footage from one frame rate to another and see the new runtime and speed change — including the classic PAL 25→24 speed-up. Playing 24 fps film at 25 fps (classic PAL speed-up) runs it 4.17% faster — a 100-minute film finishes in 96 minutes and the pitch rises a semitone unless corrected. This is frame-for-frame conform (no frame blending); for matched-duration conversion you'd retime with optical flow instead.
How to use Frame-Rate Conversion Duration Calculator
- 1Enter your values into the fields in Frame-Rate Conversion Duration Calculator.
- 2The result and any pass/fail verdict update instantly as you type — no button to press.
- 3Check the substituted formula and worked example to see exactly how the result was derived.
- 4Copy or note the result for your spec, delivery or planning.
Why use Frame-Rate Conversion Duration Calculator?
- ✓Runs entirely in your browser with instant, private results — no data leaves your device.
- ✓Built on a published reference: PAL speed-up convention.
- ✓Shows the governing formula and a worked example, so you can trust and check every result.
- ✓100% free with no sign-up, no watermark and no usage limits.
- ✓Works on any device — desktop, tablet or phone — and keeps working offline once loaded.
Frequently asked questions
What does Frame-Rate Conversion Duration Calculator do?+
Conform footage from one frame rate to another and see the new runtime and speed change — including the classic PAL 25→24 speed-up. Playing 24 fps film at 25 fps (classic PAL speed-up) runs it 4.17% faster — a 100-minute film finishes in 96 minutes and the pitch rises a semitone unless corrected.
Is my data private?+
Yes. Frame-Rate Conversion Duration Calculator runs entirely in your browser — your inputs are never uploaded, stored or logged.
What standard or source is Frame-Rate Conversion Duration Calculator based on?+
It follows PAL speed-up convention; SMPTE conform practice. Always confirm against the current official document, as specifications and rates can change.
What formula does it use?+
Frame-Rate Conversion Duration Calculator uses: new runtime = original × (fromRate ÷ toRate); speed change = (toRate/fromRate − 1) × 100%. The tool shows this formula with your own numbers substituted so you can verify the result.
Is Frame-Rate Conversion Duration Calculator free to use?+
Yes — it is completely free with no account, no sign-up and no usage limits. There is no watermark and no paywall.
Embed Frame-Rate Conversion Duration Calculator on your website
Want Frame-Rate Conversion Duration Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/framerate-conversion-duration-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Frame-Rate Conversion Duration Calculator — ToolJolt" loading="lazy"></iframe>Related Broadcast tools
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