Percentage Change Calculator
Enter the base and comparison values to calculate the percentage increase or decrease. Handy for price changes, sales trends, and score changes — all calculations happen inside your browser.
Enter the base and comparison values to see the result.
0%
No change
-
Change amount
-
Ratio (times)
How to use
- Enter the base value (the initial value).
- Enter the comparison value (the later value).
- The increase or decrease rate and the change amount are shown in real time.
Frequently asked questions
How is the rate of change calculated?
It is calculated as (comparison − base) ÷ base × 100. A positive result means an increase, a negative result a decrease.
Does it work if the base value is 0?
If the base value is 0, the change cannot be expressed as a percentage. Please enter a non-zero base value.
Are the values I enter sent to a server?
No. All calculations happen only inside your browser, and the values you enter are never sent to or stored on any server.