File Compression Ratio Calculator
Calculate the compression ratio and space savings for a file.
Calculator Inputs
Results
Compression Ratio
4.00 : 1
Space Savings
75.0%
How Much Space Did You Save?
File compression is essential for saving storage space and reducing transfer times. This calculator helps you quantify the effectiveness of your compression. Simply enter the original and compressed file sizes to see the compression ratio and the percentage of space you've saved.
Frequently Asked Questions
What is a compression ratio?
The compression ratio is a measurement of how much a file has been reduced in size. A ratio of 4:1 means the original file was four times larger than the compressed file.
What is the difference between lossless and lossy compression?
Lossless compression (e.g., ZIP) reduces file size without losing any data, so the original file can be perfectly restored. Lossy compression (e.g., JPEG, MP3) reduces file size by permanently removing some data, which can result in a much smaller file but may cause a noticeable loss in quality.