Percentage Change Calculator

Calculate how much a value increased or decreased compared with its starting value.

Initial value

Use a dot as the decimal separator.

Final value

Use a dot as the decimal separator.

Percentage change

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Calculate how much a value increased or decreased compared with its starting value.

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Percentage Change Calculator

How it is calculated

Subtract the initial value from the final value, divide by the absolute initial value, then multiply by 100.

Formula

Percentage change = ((final value − initial value) ÷ |initial value|) × 100

Worked example

If the initial value is 120 and the final value is 156, the signed difference is +36 and the percentage change is +30%.

When the initial value is zero

Division by zero is undefined, so this calculator does not show a percentage change. It still shows the signed difference, absolute difference and direction.

Comparing prices?

Use the focused price-change page for currency formatting and a plain-language answer. Answer “How much did the price increase?”

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