Drop-Frame Timecode Offset Calculator
See how far drop-frame and non-drop timecode diverge over a given duration at 29.97 fps — the hidden ~3.6 s/hour broadcast drift.
29.97 fps is really 30000/1001, so counting it as '30' makes the timecode clock run ~3.6 s fast per hour. Drop-frame fixes this by SKIPPING frame numbers (never actual frames) — 2 numbers at the start of every minute except every tenth — keeping timecode matched to the real wall clock for broadcast.
Rule / Formula
See how far drop-frame and non-drop timecode diverge over a given duration at 29.97 fps — the hidden ~3.6 s/hour broadcast drift.
About Drop-Frame Timecode Offset Calculator
See how far drop-frame and non-drop timecode diverge over a given duration at 29.97 fps — the hidden ~3.6 s/hour broadcast drift. 29.97 fps is really 30000/1001, so counting it as '30' makes the timecode clock run ~3.6 s fast per hour. Drop-frame fixes this by SKIPPING frame numbers (never actual frames) — 2 numbers at the start of every minute except every tenth — keeping timecode matched to the real wall clock for broadcast.
How to use Drop-Frame Timecode Offset Calculator
- 1Enter your values into the fields in Drop-Frame Timecode Offset 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 Drop-Frame Timecode Offset Calculator?
- ✓Runs entirely in your browser with instant, private results — no data leaves your device.
- ✓Built on a published reference: SMPTE ST 12-1 (drop-frame definition).
- ✓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 Drop-Frame Timecode Offset Calculator do?+
See how far drop-frame and non-drop timecode diverge over a given duration at 29.97 fps — the hidden ~3.6 s/hour broadcast drift. 29.97 fps is really 30000/1001, so counting it as '30' makes the timecode clock run ~3.6 s fast per hour.
Is my data private?+
Yes. Drop-Frame Timecode Offset Calculator runs entirely in your browser — your inputs are never uploaded, stored or logged.
What standard or source is Drop-Frame Timecode Offset Calculator based on?+
It follows SMPTE ST 12-1 (drop-frame definition). Always confirm against the current official document, as specifications and rates can change.
What formula does it use?+
Drop-Frame Timecode Offset Calculator uses: skipped frame numbers = dropRate × (minutes − ⌊minutes/10⌋); drift seconds = skipped ÷ nominal base. The tool shows this formula with your own numbers substituted so you can verify the result.
Is Drop-Frame Timecode Offset 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 Drop-Frame Timecode Offset Calculator on your website
Want Drop-Frame Timecode Offset 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/drop-frame-timecode-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Drop-Frame Timecode Offset Calculator — ToolJolt" loading="lazy"></iframe>Related Broadcast tools
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