% Change
Calculate the percentage increase or decrease between two values.
to
Result
0.00%
About the Percentage Change Calculator
The Percentage Change Calculator measures the relative increase or decrease between two values — prices, salaries, traffic, weight. For example, a price going from $80 to $92 is a +15% change; from $80 to $68 is −15%.
Results update instantly as you type, with precise math underneath and sensible rounding on screen. Everything runs locally in your browser.
How to use it
- Enter your value in the input field.
- Select the units or values involved.
- Read the result — it updates as you type.
- Adjust any input to recalculate instantly.
Frequently asked questions
Why is a 50% rise not undone by a 50% fall?
The bases differ: 100 +50% = 150, but 150 −50% = 75. Percentage change is always relative to the starting value.
Does it work with decimals?
Yes — enter any real number; the calculation is precise and only the display is rounded.
Is anything sent to a server?
No. All calculations run locally in your browser.
Is it free to use?
Yes, completely free, with no limits and no account required.