Example: File size 5.04 MB. Change the values above to calculate your own.
About the Audio File Size Calculator
Audio size depends on the bitrate. Compressed formats like MP3 and AAC use 64-320 kbps; uncompressed CD-quality WAV uses 1,411 kbps, roughly ten times more than a typical MP3.
How to use the Audio File Size Calculator
- Enter your numbers (or keep the example).
- The result updates instantly as you type.
- Copy the result, or copy the link: it keeps your numbers so you can share them.
Audio file size by format
| Format | 1 minute | 1 hour | Hours per GB |
|---|---|---|---|
| MP3 128 kbps | 960 KB | 57.6 MB | 17.4 |
| MP3 192 kbps | 1.44 MB | 86.4 MB | 11.6 |
| MP3 320 kbps | 2.4 MB | 144 MB | 6.9 |
| AAC 256 kbps | 1.92 MB | 115 MB | 8.7 |
| FLAC (~900 kbps) | 6.75 MB | 405 MB | 2.5 |
| WAV CD quality | 10.6 MB | 635 MB | 1.6 |
How it's calculated
Size (bytes) = bitrate in bits per second × duration in seconds ÷ 8. One minute of 320 kbps MP3 = 320,000 × 60 ÷ 8 = 2.4 MB.
Features
- Instant resultsUpdates as you type.
- Shareable linkThe URL keeps your inputs.
- Reference tableCommon values on this page.
- Works offlineRuns in your browser.
Frequently asked questions
How big is a 3-minute MP3?
About 2.9 MB at 128 kbps, 4.3 MB at 192 kbps and 7.2 MB at 320 kbps.
Is the Audio File Size Calculator free?
Yes, the Audio File Size Calculator is free with no sign-up, no limits and no ads covering the result.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers, and keeps working offline once the page has loaded.
Last updated · Processing happens locally in your browser.