Percentage Change Calculator

Measure percentage increase or decrease between two values.

Enter a value for all required fields.

About this calculator

Measure percentage increase or decrease between two values.

How to use

  1. Enter the required values.
  2. Review the result instantly.

Formula

((New − Old) ÷ |Old|) × 100

Example

100 → 120 = 20% increase

FAQ

Why is the old value required to be nonzero?

The formula divides by the old value, so zero would make the result undefined.

Can the result be negative?

Yes. A negative result means the value decreased.

Results are for informational purposes only. Verify important calculations independently.