Measure how much a value changed in percentage terms.
⌁ All calculations run locally in your browser. No data is stored.
Percentage change equals (new value − original value) ÷ the absolute original value × 100.
The calculator subtracts the original value from the new value, divides the difference by the absolute original value, and multiplies by 100.
Change any input to update the estimate instantly. Your entries never leave your device.
Subtract the original value from the new value, divide by the absolute original value, then multiply by 100.
Percentage change uses the original value as the divisor, so a zero starting value makes the percentage undefined.
Yes. A negative result means the new value is lower than the original value.