Percentage Change Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the original (from) value and the new (to) value.
- Press Calculate for the percentage change.
How it works
Percentage change = (new − old) ÷ old × 100. A positive result is an increase and a negative result is a decrease.
Worked example
100 → 150. (150 − 100) ÷ 100 × 100 = +50%.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.