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Percentage Change Calculator

Change either figure inside the question. The percentage updates immediately.

From to , what’s the percentage change?

Percentage change = (new − old) ÷ |old| × 100.

Change—

Updates automatically

Absolute change—

Direction—

Change multiplier—

MethodCompared with start

How percentage change works

Subtract the old value from the new value, divide by the absolute old value, then multiply by 100. A positive result is an increase and a negative result is a decrease.

Example: 100 to 125(125 − 100) ÷ 100 × 100 = 25%, so the value increased by 25%.

Important edge case

Percentage change from an old value of zero is mathematically undefined because the formula would require division by zero. The calculator reports this explicitly rather than inventing a percentage.

Percentage Change Calculator

How percentage change works

Important edge case

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