File Size of a 3-Minute 128 kbps MP3
A 3-minute MP3 at 128 kbps is approximately 2.9 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.
128 kbps is a standard streaming-quality bitrate; a 3-minute track weighs roughly 2.9 MB.
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.