File Size of a 4-Minute 320 kbps MP3

A 4-minute MP3 at 320 kbps is approximately 9.6 MB.

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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.

At 320 kbps, a 4-minute song takes about 9.6 MB — useful for estimating playlist storage on a device.

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.