Percentage Calculator
Calculate percentages, percentage increases, percentage decreases, and find what percentage one number is of another.
How to Use the Percentage Calculator
Enter the values into the respective calculator mode. The tool instantly calculates the results in your browser without reloading or sending data to a server.
Formula & Calculation Method
P% of V = (P / 100) × V | Change % = ((New - Old) / Old) × 100To find a percentage of a number, divide the percentage by 100 and multiply by the total. To find percentage change, divide the difference by the original value and multiply by 100.
Calculation Examples
Find percentage of a number
(15 / 100) × 240 = 36
Percentage Increase
((75 - 50) / 50) × 100 = 50%
What percentage is X of Y?
(25 / 200) × 100 = 12.5%
Frequently Asked Questions
How do I calculate a percentage of a number?
Convert the percentage into a decimal by dividing it by 100, then multiply by the total number. For example, 20% of 150 is 0.20 × 150 = 30.
How do I calculate percentage increase or decrease?
Subtract the old value from the new value, divide the result by the absolute value of the old number, and multiply by 100. If the result is positive, it is an increase; if negative, it is a decrease.
Is my calculation data saved or sent to a server?
No. All calculations run 100% locally in your web browser using JavaScript. No numbers or data are stored or transmitted.