Percentage of a value
Multiply the value by the percentage and divide by 100. For example, 15% of 200 equals 30.
FREE PERCENTAGE CALCULATOR
Free Percentage Calculator
Use this free percentage calculator to find a percentage of a value, work out what percent one number is of another, and calculate percentage increases or decreases.
FREE TO USE INSTANT RESULTS BROWSER-BASED
01 / PERCENTAGE OF A VALUE
What is X% of Y?
Find the amount represented by a percentage.
Calculated amount—
Calculation—percentage × value ÷ 100
02 / PART AS A PERCENTAGE
What percent is X of Y?
Compare a part with a total value.
Percentage share—
Calculation—part ÷ whole × 100
03 / PERCENTAGE CHANGE
How much did it change?
Compare an original value with a new value.
Percentage change—
Absolute difference—
Percentage change uses the original value as its denominator. It cannot be calculated when the original value is zero.
HOW IT WORKS
Calculate percentages, shares and percentage changes
Find a percentage of a value, compare one number with another, or measure how much a value has increased or decreased.
Part as a percentage of a whole
Divide the part by the whole and multiply by 100. The result is undefined if the whole is zero.
Percentage increase or decrease
Compare the difference with the original value. A positive result is an increase and a negative result is a decrease.
FREE PERCENTAGE CALCULATOR
Calculate percentages, shares and percentage changes
Find a percentage of a value, compare one number with another, or measure how much a value has increased or decreased.
Choose the percentage question
Decide whether you need a percentage of a value, a part-to-whole percentage or a change between two values.
Enter the numbers
Fill in the percentage and values. The matching result updates as you edit the inputs.
Review the calculation
Read the result and its formula, then use it in your own worksheet, estimate or comparison.
This calculator separates three common questions: finding a percentage of a number, finding what percentage a part represents, and calculating percentage change between two values.
Percentage Calculator FAQs
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 is 30.
How do I find what percentage one number is of another?
Divide the part by the whole and multiply by 100. The whole must not be zero.
How is percentage change calculated?
Subtract the original value from the new value, divide the difference by the original value, then multiply by 100. Percentage change is undefined when the original value is zero.