Percentage Calculator
Quickly calculate ratios, percentage change, and discounts.
Result
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Usage examples
Calculating a shopping discount
An item priced at $500 is 20% off — what's the discount? In "Percentage of a number" mode, enter 20 for the percent and 500 for the number to instantly see the discount amount: $100.
Checking a test score
You answered 68 out of 80 questions correctly — what's your score? In "What percentage is X of Y" mode, enter 68 for the part value and 80 for the whole value to get 85%.
Checking revenue growth
Revenue went from $10,000 last month to $12,000 this month — what's the growth rate? In "Percentage change" mode, enter 10000 for the from value and 12000 for the to value to see a 20% increase.
Frequently asked questions
What is the formula for calculating a percentage?
To find a percentage of a number, calculate (percent ÷ 100) × number. For example, 20% of 150 is (20 ÷ 100) × 150 = 30.
How do I calculate what percentage one value is of another?
Calculate (part ÷ whole) × 100. For example, 30 is (30 ÷ 150) × 100 = 20% of 150.
How do I calculate percentage change?
Calculate (new value − old value) ÷ old value × 100. Going from 100 to 120 is (120 − 100) ÷ 100 × 100 = a 20% increase.
What's the difference between percent (%) and percentage points (pp)?
A percentage is a relative change between two values, while a percentage point is the simple difference between two percentage values. For example, if an interest rate rises from 5% to 10%, that's a "5 percentage point increase" and also a "100% increase."