Frame Rate Family Checker
Check whether two frame rates belong to the same family (NTSC, PAL, film) — the fast way to predict whether a conform will be clean or need retiming.
23.976 and 24 differ by exactly 1000/1001 (0.1%) — the NTSC fractional pair you slip between losslessly. But 24 and 25 are different families (4.17% apart) needing real retiming. Telling these apart instantly tells you whether a conform is a metadata flag or a render.
Rule / Formula
Check whether two frame rates belong to the same family (NTSC, PAL, film) — the fast way to predict whether a conform will be clean or need retiming.
About Frame Rate Family Checker
Check whether two frame rates belong to the same family (NTSC, PAL, film) — the fast way to predict whether a conform will be clean or need retiming. 23.976 and 24 differ by exactly 1000/1001 (0.1%) — the NTSC fractional pair you slip between losslessly. But 24 and 25 are different families (4.17% apart) needing real retiming. Telling these apart instantly tells you whether a conform is a metadata flag or a render.
How to use Frame Rate Family Checker
- 1Enter your values into the fields in Frame Rate Family Checker.
- 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 Family Checker?
- ✓Runs entirely in your browser with instant, private results — no data leaves your device.
- ✓Built on a published reference: SMPTE frame-rate definitions (23.976 = 24×1000/1001).
- ✓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 Family Checker do?+
Check whether two frame rates belong to the same family (NTSC, PAL, film) — the fast way to predict whether a conform will be clean or need retiming. 23.976 and 24 differ by exactly 1000/1001 (0.1%) — the NTSC fractional pair you slip between losslessly.
Is my data private?+
Yes. Frame Rate Family Checker runs entirely in your browser — your inputs are never uploaded, stored or logged.
What standard or source is Frame Rate Family Checker based on?+
It follows SMPTE frame-rate definitions (23.976 = 24×1000/1001). Always confirm against the current official document, as specifications and rates can change.
What formula does it use?+
Frame Rate Family Checker uses: speed ratio = rate B ÷ rate A; ratios near 1.000 or 1.001/0.999 indicate the same or fractional-pair family. The tool shows this formula with your own numbers substituted so you can verify the result.
Is Frame Rate Family Checker 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 Family Checker on your website
Want Frame Rate Family Checkeron 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/frame-rate-family-checker" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Frame Rate Family Checker — ToolJolt" loading="lazy"></iframe>Related Broadcast tools
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