Percentage calculator
What is X% of Y, increases, discounts and percent change.
How to useCalculate percentages.
What is % of
is what % of
From to , changed by
increased by %
with a discount of %
Value before a discount of % that resulted in
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Percentage calculator: what it is for
The percentage calculator solves the most common calculations: what X% of a number is, what percentage one number is of another, increases, discounts and the percent change between two values.
Everything updates as you type.
How to use
- Choose the type of calculation.
- Fill in the values.
- See the result right away.
When to use it
- Work out salary and rent increases.
- Price discounts and markups.
- Change in sales and investments.
Frequently asked questions
How do I calculate 15% of a number?
Multiply the number by 15 and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30.
How do I find a discount as a percentage?
Use “From X to Y, changed by”: from 100 to 80 shows −20%.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.