Audio Tools

Audio File Size Estimator

Enter a duration and either a bitrate or sample rate/bit depth/channel count to estimate the resulting file size.

2.81 MB

Compressed formats estimate size from bitrate × duration. Uncompressed PCM (like WAV) estimates raw size from sample rate × bit depth × channel count × duration, ignoring any file-format header overhead.

How to use this tool

  1. 1Choose compressed (bitrate-based) or uncompressed PCM.
  2. 2Enter the duration and the relevant settings.
  3. 3See the estimated file size in MB.

Frequently asked questions

Why is my actual file a bit different from the estimate?+

This estimates raw audio data size — actual files also include format headers, metadata tags, and (for compressed formats) variable bitrate fluctuations, which can shift the size slightly.

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