Free Online Percentage Calculator
Solve common percentage problems instantly with three calculation modes: find what X% of Y is, determine what percentage X is of Y, and calculate percentage increase or decrease between two numbers. Perfect for financial calculations, grade computations, discount calculations, and statistical analysis. All calculations happen locally in your browser.
15% of 200 is
30
Common questions
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original value, then multiply by 100. For example: if a price went from $80 to $100, the increase is (100-80)/80 × 100 = 25%. The Increase/Decrease tab does this automatically.
What's the formula for finding X% of a number?
Multiply the number by X and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30.