Percentage Calculator
Calculate percentages, reverse percentages, and percentage change between two values.
Result
30.00
20% of 150 is 30.00
Formula
Percentage of value = (Percentage ÷ 100) × Value
Switch calculation types above to find what percent one number is of another, or to find the percentage change between two values.
What this calculator does
This calculator handles the three most common percentage questions: finding a percentage of a number, finding what percent one number is of another, and finding the percentage increase or decrease between two values.
Related Calculators
Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 150 is (20 × 150) ÷ 100 = 30.
How do I find what percent one number is of another?
Divide the first number by the second and multiply by 100. For example, 30 is (30 ÷ 150) × 100 = 20% of 150.
What is the difference between percentage change and percentage points?
Percentage change measures the relative change between two values as a percentage of the starting value. Percentage points measure the absolute difference between two percentages and are not the same calculation.