Percentage Calculator
Solve any percentage problem instantly with multiple calculation modes. Calculate what percentage one number is of another, find a specific percentage of a value, determine percentage increase or decrease between two numbers, and work backwards from a percentage to find the original value. Percentage calculations come up constantly in everyday life — calculating sale discounts, determining tax amounts, figuring out a grade, working out profit margins, measuring growth rates, and splitting costs. Our Percentage Calculator handles all these scenarios with instant results and clear explanations.
Percentage Calculator
Calculate percentages, changes, and proportions instantly.
How to Use Percentage Calculator
- 1Select the calculation type: % of a number, what % is X of Y, or % change
- 2Enter the required values in the input fields
- 3View the calculated result instantly
- 4Read the formula explanation to understand the calculation
About Percentage Calculator
Solve any percentage problem instantly with multiple calculation modes. Calculate what percentage one number is of another, find a specific percentage of a value, determine percentage increase or decrease between two numbers, and work backwards from a percentage to find the original value. Percentage calculations come up constantly in everyday life — calculating sale discounts, determining tax amounts, figuring out a grade, working out profit margins, measuring growth rates, and splitting costs. Our Percentage Calculator handles all these scenarios with instant results and clear explanations.
Your Privacy is Protected
Percentage Calculator runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.
Frequently Asked Questions
How do I calculate a 20% discount?
Use the "X% of Y" mode — enter 20 as the percentage and your original price as Y. The result is the discount amount. To get the final price, subtract the discount from the original price.
How do I calculate percentage increase?
Use the "Percentage Change" mode. Enter the original value and the new value. The formula is: ((New - Original) / Original) × 100. A positive result is an increase; negative is a decrease.
How do I find what percentage X is of Y?
Use the "What % is X of Y" mode. For example, to find what percentage 45 is of 180, enter 45 as X and 180 as Y. The formula is (X / Y) × 100 = 25%.
Can I calculate reverse percentages?
Yes. If you know the final amount after a percentage change and want the original, use the reverse percentage mode. For example: if a price after 20% increase is $120, the original was $120 / 1.20 = $100.
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