How is percentage change calculated?

(end − start) / |start| × 100.

What if the starting value is zero?

Percentage change is undefined when the starting value is zero.

Percentage Change Calculator

Calculate the percentage change between a starting value and an ending value.

INPUTS

Starting value

Ending value

RESULTS

Absolute difference25.0000

Percentage change25.00%

DirectionIncrease

How to use

Enter the starting value.
Enter the ending value.
The absolute difference and percentage change are calculated instantly.

Frequently asked questions

How is percentage change calculated?: (end − start) / |start| × 100.
What if the starting value is zero?: Percentage change is undefined when the starting value is zero.

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This tool is provided for general informational and workflow purposes only. It does not constitute financial, investment, tax, or professional advice. All calculations run in your browser; no input data is transmitted or stored.