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Calixo

Percentage Change Calculator

Find the percentage increase or decrease between two numbers.

Inputs

The starting number.

The ending number.

Saved Scenarios

— select 2+ to compare

Percentage Change

25.0%

Spark says

How it's calculated

Formula

% Change=New−OldOld×100\%\ Change = \dfrac{New - Old}{Old} \times 100
Old
— The starting value
New
— The ending value

What is the Percentage Change Calculator?

Percentage change measures how much a value has increased or decreased relative to its original amount, expressed as a percentage.

How to use it

  1. 1 Enter the old (starting) value.
  2. 2 Enter the new (ending) value.
  3. 3 Read the percentage change — positive means increase, negative means decrease.

Worked examples

From 80 to 100

That's a 25% increase.

Try it

Common mistakes

  • ⚠️ Dividing by the new value instead of the old value, which gives a different (incorrect) result.

Frequently asked questions

Why is percentage change different from percentage points?

Percentage change is relative to the starting value, while a change in percentage points is a simple subtraction — going from 20% to 25% is a 5 percentage-point increase but a 25% relative increase.