Percentage Change Calculator

Calculate percentage change with reusable inputs and a clear result. This free calculator runs locally, supports shareable URL values and does not send entered amounts to analytics.

🔒 100% private — files never leave your browser

Original value

New value

Result

Percentage change

Your values stay in this URL when you share it; they are not sent to analytics.

Formula

((new value − original value) ÷ |original value|) × 100

Worked example

From 100 to 125 = 25% increase.

How to use the Percentage Change Calculator

1 Enter the values for the calculation.
2 Review the formula and worked example below the form.
3 Copy the result or share the URL with its values when useful.

Frequently asked questions

What is the percentage change formula?

((new value − original value) ÷ |original value|) × 100.

Are my entered amounts uploaded?

No. The calculation runs in your browser. URL sharing stores values only in the address you choose to share.

Is this financial, tax or medical advice?

No. This is a general arithmetic tool. Verify business decisions and local requirements with qualified sources.

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