Percentage Change Calculator

Calculate percentage increase or decrease between two values.

Enter both values.

About this calculator

Use this calculator to measure how much a value increased or decreased.

How to use

  1. Enter the old value and the new value.
  2. Read the percentage change and direction.

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.