Convert between time formats: HH:MM:SS.ms, total seconds, milliseconds and frames at 24, 25, 30 or 60 fps. Useful for video, subtitles and editing.
When editing video or working with subtitles you often need to convert between time formats. HH:MM:SS.ms is the human format (used by SRT, VTT, Premiere). Total seconds is what APIs and most audio processing libraries use. Frames depend on the project FPS: at 24 fps a second is 24 frames, at 25 fps it is 25, and so on. This converter lets you jump between the four formats without opening a spreadsheet. Everything runs in your browser.
If what you actually need is to generate the SRT/VTT from an audio file, here are market prices:
| Service | Price per hour |
|---|---|
| VOCAP (pack 30h) | 1.00 EUR |
| VOCAP (pack 1h) | 1.99 EUR |
| Otter.ai Pro (1200 min/mo) | ~0.85 EUR* |
| Descript Creator (10h/mo) | ~2.40 EUR* |
| Rev.com AI | 15.00 EUR |
| Human transcription (budget) | 15.00 EUR |
| Human transcription (pro) | 90.00 EUR |
* Effective price if you use the entire monthly quota. If not, it goes up. VOCAP is pay-per-use with no monthly fee.
24 fps is the cinema standard. 25 fps is the European TV standard (PAL). 29.97 / 30 fps is the US and Japan TV standard (NTSC). 60 fps is used in games, sports and high-speed video. If you do not know the FPS, check the file properties or ask the editor.
Because of "drop frame": NTSC runs at 29.97 real fps even though it is counted as 30. In short clips (< 1 min) the difference is invisible; in a 1-hour piece there is a 3.6-second offset. For professional subtitles or dubbing work, use the exact project FPS, not a rounded 30.
Almost identical: both use HH:MM:SS,ms (SRT with a comma) or HH:MM:SS.ms (VTT with a dot). The converter accepts both and normalises to dot. For bulk conversions across whole files, use the SRT/VTT/TXT converter.
Depends on the FPS. At 24 fps: 41.67 ms. At 25 fps: 40 ms. At 30 fps: 33.33 ms. At 60 fps: 16.67 ms. This converter computes it automatically when you input the value in frames.
No. Everything is computed in your browser with JavaScript. No data is sent, no logs, no signup.
That is automatic transcription. VOCAP transcribes to SRT/VTT with word-level timestamps. 30 minutes free on signup.
VOCAP transcribes to SRT/VTT with word-level timestamps. 30 minutes free on signup.
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