Calculator

Estimate audio size and length

Calculate file size from duration and bitrate, storage for batches, or drop an audio file to read its duration locally.

kbps

Drop audio file

or click to inspect duration and size locally.

MP3, WAV, M4A, OGG and browser-supported audio
Estimated file size
Per hour
Total storage
Dropped file

How the audio calculator works

Compressed audio size is estimated from bitrate: size = bitrate × duration. Drop a file to read the browser-reported duration and compare actual size to estimated bitrate.

Questions

Are audio files uploaded?

No. Files are opened as local object URLs in your browser.

Why is actual size different?

Variable bitrate, metadata and container overhead can make real files smaller or larger than the estimate.

Can it calculate storage for many files?

Yes. Set the file count to estimate total storage for episodes, albums or batches.