Math & Conversion
Change Rate Calculator
Compare an original value with a new one to find the absolute change and percentage change, including decreases.
How to use
Enter the values requested above. Compare an original value with a new one to find the absolute change and percentage change, including decreases. The result is calculated in your browser.
Formula
Change = new value − original value. Change rate = (new value − original value) ÷ |original value| × 100.
Example
A value moves from 80 to 100. What changed?
It increased by 20, which is a 25% increase from the original value.
Frequently asked questions
- Can the original value be zero?
- The absolute change can be found, but a percentage change from a zero baseline is undefined.
- Are my entries stored?
- No. The calculation runs in your browser, and this page does not save the values you enter.