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Data Compression Ratio and Space Saving Calculator

CR = original size / compressed size.

Calculates compression ratio CR = original / compressed, space saving % = (1 − 1/CR) × 100, and the amount of space freed.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

MB
MB

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

CR = S_orig/S_comp; saving% = (1−1/CR)×100

In depth

Calculates compression ratio CR = original / compressed, space saving % = (1 − 1/CR) × 100, and the amount of space freed.