Percentage Calculator
Solve percentage problems: X% of Y, X is what % of Y, and more.
About the Percentage Calculator
Percentage problems come in a few different shapes — finding X% of a number, figuring out what percentage one number is of another, or calculating a percentage increase or decrease. This tool covers all three in one place.
It's commonly used for tips, grades, discounts, statistics, and comparing changes between two values.
How to Use This Tool
- 1Choose the type of percentage calculation you need.
- 2Enter the relevant numbers into the fields provided.
- 3The result updates instantly as you type.
Common percentage formulas
X% of Y = (X ÷ 100) × Y.
X is what percent of Y = (X ÷ Y) × 100.
Percentage change = [(New value − Old value) ÷ Old value] × 100.
Frequently Asked Questions
How do I calculate a percentage increase?
Subtract the old value from the new value, divide by the old value, then multiply by 100. A positive result is an increase; a negative result is a decrease.
What's the difference between percentage and percentage points?
A percentage point is a direct difference between two percentages (e.g., going from 20% to 25% is a 5 percentage-point increase), while a percentage change describes that same move as a 25% relative increase.
Related Tools
Basic Calculator
A clean, fast calculator for everyday arithmetic operations.
Scientific Calculator
Advanced calculator with trig, logarithm, and power functions.
Fraction Calculator
Add, subtract, multiply, and divide fractions with simplification.
Ratio Calculator
Simplify ratios and solve for an unknown value in a proportion.