MP3 and Podcast File Size Calculator
Fill in the values and the answer updates as you type.
How the MP3 and Podcast File Size Calculator works
File size = bitrate × seconds ÷ 8 for constant-bitrate MP3, AAC, or Opus files. Variable-bitrate files average out to roughly the same figure. Speech podcasts are often published at 64 to 128 kbps mono or stereo, while music is commonly 192 to 320 kbps. Metadata and cover art add a little more. Example: with Bitrate 128 kbps, and Episode length 60 min, the result is File size (MB) = 57.6; Size per hour (MB) = 57.6; Episodes per GB = 17.4.
Inputs and results
The MP3 and Podcast File Size Calculator takes 2 inputs and gives 4 results.
What you enter
- Bitrate (kbps) — starts at 128.
- Episode length (min) — starts at 60.
What you get
- File size (MB)
- Size per hour (MB)
- Episodes per GB
- Minutes of audio per GB
Example: MP3 and Podcast File Size Calculator with the starting values
With bitrate 128 kbps and episode length 60 min, the calculator returns:
| File size (MB) | 57.6 |
|---|---|
| Size per hour (MB) | 57.6 |
| Episodes per GB | 17.4 |
| Minutes of audio per GB | 1,042 |
Change any value above and the results update straight away.
MP3 and Podcast File Size Calculator FAQ
How do I use the MP3 and Podcast File Size Calculator?
Enter bitrate and episode length in the fields, then read file size (mb), size per hour (mb), episodes per gb and minutes of audio per gb in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the MP3 and Podcast File Size Calculator calculate?
Compressed audio size from bitrate and episode length. It returns file size (mb), size per hour (mb), episodes per gb and minutes of audio per gb from the 2 values you provide.
What values does the MP3 and Podcast File Size Calculator start with?
It opens with bitrate 128 kbps and episode length 60 min so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the MP3 and Podcast File Size Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the MP3 and Podcast File Size Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.