Percentage Calculator
Solve any percentage problem instantly: find X% of Y, calculate percentage increase, or percentage decrease.
Inputs
Results
20% of 150
30
About the Percentage Calculator
Percentages show up everywhere — tips, taxes, discounts, grades, growth rates. This calculator handles the three most common percentage questions in one tool.
Switch between modes to compute a simple percentage of a number, or apply a percentage change up or down from a starting value.
Frequently asked questions
Multiply Y by X divided by 100. Example: 20% of 150 = 150 × 0.20 = 30.
More math calculators
Scientific Calculator
Trigonometry, logarithms, exponents, and more.
Fraction Calculator
Add, subtract, multiply, divide, and simplify fractions.
Random Number Generator
Generate random numbers in any range, with or without duplicates.
Triangle Calculator
Solve missing sides and angles, area, and perimeter.
Standard Deviation Calculator
Mean, variance, and population or sample standard deviation.