Percentage Calculator
Calculate percentages, find percentage changes, and solve percentage problems quickly with our free online percentage calculator.
What is X% of Y?
Find a percentage of any number.
Result
20
X is What Percentage of Y?
Find what percentage one number is of another.
Result
25%
Percentage Increase
Calculate how much a value has increased.
Increase
50%
Percentage Decrease
Calculate how much a value has decreased.
Decrease
25%
How to Use the Percentage Calculator
- Choose the percentage calculation you need.
- Enter your numbers in the input fields.
- The result updates automatically as you type.
- Use another calculator section for a different calculation.
Percentage Calculation Formulas
Percentage of a Number: (Percentage × Number) ÷ 100
What Percentage: (Part ÷ Total) × 100
Percentage Change: ((New Value − Original Value) ÷ Original Value) × 100
Frequently Asked Questions
What is a percentage?
A percentage is a way of expressing a number as a fraction of 100. It is represented by the % symbol.
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide the result by 100.
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original value, and multiply by 100.
Is this percentage calculator free?
Yes. This online percentage calculator is free to use.
Are my calculations private?
Calculations happen directly in your browser. The numbers you enter are not sent to our server.