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Percentage Change Calculator

Calculate percentage change between two values with a clear browser-only breakdown of the difference, direction, and formula.

🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.

Percentage change

25.00%

An increase of 20.00 from 80 to 100.

Calculated privately in your browser.

How Percentage Change Calculator works

  1. Enter the original value.
  2. Enter the new value.
  3. Review the percentage and direction of the change.

FAQ

What is percentage change?

It compares the difference to the starting value.

Why cannot the starting value be zero?

The formula divides by the starting value, so zero makes it undefined.

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