Duration and format in, file size out. The formula is shown under the result, and nothing leaves your browser.
| Format | Bitrate | 1 hour | 10 hours |
|---|---|---|---|
| Opus (voice) | 32 kbps | 14.4 MB | 144 MB |
| MP3 / Opus | 64 kbps | 28.8 MB | 288 MB |
| MP3, AAC / M4A, OGG | 128 kbps | 57.6 MB | 576 MB |
| MP3 | 192 kbps | 86.4 MB | 864 MB |
| AAC / M4A | 256 kbps | 115.2 MB | 1.15 GB |
| MP3 | 320 kbps | 144 MB | 1.44 GB |
| WAV 16-bit 16 kHz mono | 256 kbps | 115.2 MB | 1.15 GB |
| WAV 16-bit 44.1 kHz mono | 705.6 kbps | 317.5 MB | 3.18 GB |
| FLAC 16-bit 44.1 kHz stereo (assumed) | about 776 kbps | about 349 MB | about 3.49 GB |
| WAV 16-bit 44.1 kHz stereo | 1,411.2 kbps | 635 MB | 6.35 GB |
| WAV 24-bit 48 kHz stereo | 2,304 kbps | 1.04 GB | 10.4 GB |
| WAV 32-bit float 48 kHz stereo | 3,072 kbps | 1.38 GB | 13.8 GB |
Measured on production, 30 days to 2026-10-16: the median MP3, M4A and AAC file uploaded to WhipScribe came to 58 MB per hour, which is 128 kbps. The median WAV came to 115 MB per hour, which is 16-bit 16 kHz mono.
You do not need to compress or split audio for WhipScribe. One file up to 10 hours or 5 GB uploads as it is, so every compressed format in the table fits ten hours in one file. Only stereo WAV at 44.1 kHz and above crosses 5 GB before the 10-hour mark. For that case, export an M4A or MP3 copy, which keeps every word, or send a link. A file over 2 GB uploads the same way, up to 5 GB, and transcription starts with a free preview of the opening minutes.
To see the time and cost for a specific recording, use the large recording calculator. There is more on transcribing large files and on transcription for long recordings. The opening minutes are a free preview; packs are $4 for 500 minutes, $12 for 2,000 minutes and $24 for 5,000 minutes, and credits never expire.
Recordings are transcribed on our own servers and are never used for training.
Will it upload as is, how long will it take, and which pack covers it.
CalculatorHow big an hour of 720p, 1080p or 4K video is, and how small its audio track is.
GuidePer-hour sizes for every common format, and what that means for 2, 5 and 10 hours.
ConverterWAV to MP3 or M4A in your browser, when you want a smaller copy to keep.
Once the file is ready, send it as it is: see transcribing a long MP3 or M4A, MP3 to text and a podcast episode as text from its link.