How to Calculate Compression Ratio

What is Compression Ratio?

A data compression ratio calculator determines how much storage space is saved by compression, and estimates compression/decompression time. Compression ratio = original size ÷ compressed size. Text files typically compress 3–10×; already-compressed files (JPEG, MP4) see minimal benefit.

Step-by-Step Guide

1Compress data with selected algorithm
2Compare original to compressed size
3Calculate ratio

Worked Examples

Input

Original 100MB, compressed 25MB

Result

4:1 compression ratio

Varies by data type

Common Mistakes to Avoid

✕Wrong parameters
✕Missing adjustments

Frequently Asked Questions

What does this calculator do?

Set parameters

How do I use this calculator?

Run calculation

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