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Percentage Change Calculator

Calculate the percentage increase or decrease between two values.

Last updated: 9 Aug 2026

Quick answer

Percentage change = ((new value − old value) ÷ old value) × 100. For example, going from 200 to 250 is a 25% increase; a negative result means a decrease. Enter the old and new values above.

Find the percentage increase or decrease between two values: change = ((new − old) ÷ old) × 100. A negative result is a decrease.

How to calculate percentage change

  1. 1 Enter the old (original) value.
  2. 2 Enter the new value.
  3. 3 We compute the percentage change instantly.

Frequently asked questions

How do I calculate percentage change?
Subtract the old value from the new, divide by the old value, and multiply by 100.
What does a negative result mean?
A negative percentage change means the value decreased.
Increase vs decrease?
A positive result is an increase; a negative result is a decrease relative to the original value.

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