Percentage Change

Work out the percentage change between two values, with the difference and the formula shown.

Calculate percentage change

Original value

New value

Percentage change: —

Difference: —

Direction: —

Working: —

Percentage change is the difference divided by the original value, multiplied by 100. Everything runs locally in your browser.

Common questions about the free online percentage change.

Enter the original value and the new value. The tool shows the change as a percentage, together with the difference and the direction.

Percentage change equals the new value minus the original value, divided by the original value, then multiplied by 100.

A positive result is an increase and a negative result is a decrease. The direction row states it in words as well.

Percentage change is not defined when the starting value is zero, because the formula divides by zero. The tool reports it as undefined instead.

No. Percentage change compares a new value with an original value, while percentage difference compares two values without treating either one as a.

Subtract the original value from the new value, divide by the original value, then multiply by 100. For 200 to 250 the increase is 25 percent.

Press Swap values to reverse the two inputs and see the change in the opposite direction.

Yes, the calculator accepts decimals, negative values and very large numbers.

No. Everything is calculated in your browser, so your numbers never leave it.

Yes. It is free and unlimited, with no account, no sign-up and no usage limits.

Last updated: October 10, 2026