File Size of a 1-Hour 320 kbps Audio
One hour of audio at 320 kbps is approximately 144 MB.
How to use this tool
- Enter bitrate and duration in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your file size and the full breakdown beneath it.
Streaming or storing an hour-long show at 320 kbps costs about 144 MB of data — handy for download planning.
Frequently asked questions
- How large is a 3-minute MP3 at 320 kbps?
- Approximately 6.87 MB. At 128 kbps the same track would be around 2.75 MB.