Percentage Calculator
Work out percentages, discounts and percentage change.
What is X% of Y?
X is what percent of Y?
Percentage change from X to Y
Price after a discount
About the Percentage Calculator
The Percentage Calculator answers the four most common percentage questions instantly and shows the formula, so you can check the working.
How to use it
- Pick the calculator that matches your question.
- Type your numbers. The answer updates as you type.
- Read the formula under the answer to see how it was worked out.
Example
A $480 laptop with 15% off costs $408. You save $72.
Questions people ask
How do I calculate percentage change?
Subtract the old value from the new value, divide by the old value, then multiply by 100. From 80 to 100 is (100 − 80) ÷ 80 × 100 = 25% increase.
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