Percentage Calculator
Percentage Calculator: free, accurate and easy to use. Results update instantly in your browser, with no sign-up.
How to use
Percentages describe a part of 100. Use this calculator to find X% of a number, to see what percentage one number is of another, or to measure the percentage increase or decrease between two values. It is useful for discounts, grades, prices and statistics.
- Enter your numbers.
- Results update instantly as you type.
- Adjust the values to compare scenarios.
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Frequently asked questions
How do I calculate X% of Y?
Multiply Y by X and divide by 100. For example, 15% of 200 is 200 × 15 ÷ 100 = 30.
How is percentage change calculated?
Subtract the old value from the new value, divide by the old value and multiply by 100. A positive result is an increase and a negative result is a decrease.
Is it free?
Yes. All calculators are free, with no sign-up and no limits.
Is my data stored?
No. Calculations run in your browser and nothing you enter is sent or stored.
How accurate are the results?
Calculations use standard formulas. Results are estimates for general information; for important decisions, confirm with a professional or your provider.