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Percentage Calculator
Work out percentages, percentage change and what percent one number is of another.
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About this toolPercentage Calculator answers the three common questions: what is X% of Y, X is what percent of Y, and the percentage change from X to Y.
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Percentage Calculator answers the three common questions: what is X% of Y, X is what percent of Y, and the percentage change from X to Y.
More about Percentage CalculatorHow to use, good to know & FAQ
How to use Percentage Calculator
- Pick the calculation you need.
- Enter the two numbers; the answer updates as you type.
Frequently asked questions
How is percentage change calculated?
(New value minus old value) divided by the old value, times 100. A negative result is a decrease.
How do I calculate percentage increase?
Subtract the old value from the new value, divide by the old value and multiply by 100.
How do I find 20% of a number?
Multiply the number by 0.2 — for example, 20% of 150 is 30.
When to use Percentage Calculator
- Work out discounts and sale prices
- Calculate exam scores as percentages
- Measure growth in sales or traffic
- Figure out tips, tax or commission
📘 Read the guide: How to Calculate Percentages: Simple Formulas With Examples