What is the Percentage Change Calculator?
Percentage change shows how much a value went up or down relative to where it started: (new − old) ÷ old × 100. Prices, salaries, marks and sales are all compared this way.
How to use it
- 1
Enter the old value
Where it started.
- 2
Enter the new value
Where it ended.
- 3
Read the change
As a percentage.
Features
Increase or decrease
Colour-coded.
Percentage difference
For comparing two values without an order.
Multiplier and reverse
Including the change back the other way.
Popular uses
Prices and inflation
How much more things cost.
Salaries
Your raise as a percentage.
Business
Sales growth.
Frequently asked questions
Why isn't a 50% drop undone by a 50% rise?
100 → 50 is −50%, but 50 → 100 is +100%, because the base changes.
What's percentage difference?
It compares two numbers by their average, without calling one old or new.