Audio File Size Calculator
Calculate audio file size from duration and bitrate, with format presets.
–File size
–Per hour
–3-min songs / GB
How to use
Pick a format preset or enter a custom bitrate — size updates live; everything runs in your browser.
Frequently asked questions
How big is a 3-minute MP3?
At 320 kbps about 7.2 MB; at 128 kbps about 2.9 MB.
What bitrate is CD quality?
1411 kbps uncompressed (WAV); FLAC is roughly half that.
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