Free · Music calculators 🎵

Uncompressed Audio Size & PCM Bitrate

Calculate raw PCM audio size and bitrate from sample rate, bit depth, channels and duration, with reverse duration calculations.

  • Formula & worked example
  • Private in your browser
  • No signup
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

One minute of 44.1 kHz, 16-bit stereo PCM contains 10.584 MB of audio data at 1,411.2 kilobits per second, before headers and metadata.

Bitrate = samples per second × bits per sample × channels; data size = bitrate × duration

Worked example

Enter these known values and leave the other values blank.

Audio length
1:0 min / sec
PCM bitrate
1411.2 kbit /s
Raw audio payload size
10.584 MB

Assumptions and limitations

  • The calculation is for uncompressed PCM samples, excluding container headers, metadata, padding, compression and encoding overhead.
  • A sample is counted for each channel. Stereo has two channels; channel-layout names do not determine compression or codec behavior.
  • MB is decimal megabytes. One byte contains eight bits. Use the unit selectors to distinguish binary capacity units where offered.
  • The listed bit depths and sample rates are arithmetic choices, not a guarantee that a device or file format supports that combination.

Common questions

Does this predict an MP3 file size?

No. Compressed codecs use different bitrate rules. This calculator multiplies the uncompressed sample count by the bits stored per sample.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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