Percentage Calculator
Calculate any percentage instantly. What is X% of Y? Find percentage of a number, percentage change, or percent of a percentage. Free online calculator.
What is X% of Y?
X is what % of Y?
Percentage Change
Increase/Decrease by %
How to Use Percentage Calculator
- Choose your calculation type (percent of, percentage, or change)
- Enter the numbers in the input fields
- Results calculate automatically as you type
- All three calculation modes are available on one page
About Percentage Calculator
Calculate percentages easily with our free calculator. Find what percent one number is of another, calculate percentage increase/decrease, or find a percentage of any number. Perfect for sales, tips, grades, discounts, and everyday math.
Frequently Asked Questions
What percentage calculations are supported?
Three types - "What is X% of Y?", "X is what percent of Y?", and "Percentage change from X to Y".
How do I calculate a discount?
Use "What is X% of Y?" with the discount percentage and original price. Subtract the result from the original price.
How is percentage change calculated?
Percentage change = ((New - Old) / Old) × 100. Positive results mean increase, negative means decrease.
Does this handle decimal percentages?
Yes, you can enter decimal values like 12.5% or calculate results with decimal precision.
How do I calculate a percentage of a percentage?
To find a percentage of a percentage, multiply them together. For example, 20% of 50% = 0.20 × 0.50 = 0.10 = 10%. You can use the "What is X% of Y?" mode to calculate this step by step.
How do I find what percentage one number is of another?
Use the "X is what % of Y?" mode. Enter the part as X and the whole as Y. For example, 25 is what percent of 200? Answer is 12.5%. The formula is (Part / Whole) × 100.
How do I calculate percent of a number?
Use the "What is X% of Y?" mode. Enter the percentage and the number. For example, what is 15% of 200? Enter 15 and 200 to get 30. The formula is (Percentage / 100) × Number.