Image & File Tools
ZIP Size Calculator
Estimate compressed ZIP size and potential storage savings.
Estimated ZIP Size
70 MB
Estimated Savings
30 MB
ZIP compression is not predictable
ZIP compression savings depend heavily on the files being compressed. Text, CSV, source code and some documents can compress substantially, while JPG, PNG, MP4, WebP and other already-compressed formats may produce little additional savings.
This calculator provides an estimate rather than a guaranteed archive size.
How the estimate works
Estimated ZIP size equals the original size multiplied by one minus the estimated compression percentage.