Free Math Tool
Percentage Change Calculator
Enter an old value and a new value to instantly calculate the percentage change between them, whether that's an increase or a decrease.
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Percentage Change Calculator
Result
Fill in the fields to see your % change calculation
All calculations happen instantly in your browser — nothing is sent to a server.
About the % Change Calculator
Common uses: salary raises, price changes, investment growth, weight loss/gain tracking, and year-over-year comparisons.
Frequently Asked Questions
What's the formula for percentage change?
Percentage Change = ((New Value − Old Value) ÷ Old Value) × 100. A positive result is an increase; a negative result is a decrease.
Can I use this for a salary raise calculation?
Yes — enter your old salary as the old value and your new salary as the new value to see your raise as a percentage.
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