Percentage Calculator
Calculate percentages, find what percent one number is of another, and compute percentage changes. Free, instant, and accurate calculations.
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How to Calculate Percentages
Choose Mode
Select what type of percentage calculation you need.
Enter Values
Fill in the numbers for your calculation.
View Result
See the result instantly. All modes update as you type.
Why Use Our Percentage Calculator?
Multiple Modes
Calculate percentage of a number, find percentage between numbers, and compute changes.
Instant Results
Results update in real time as you type. No buttons needed.
Completely Free
No limits, no signup. Calculate as many percentages as you need.
Private & Secure
All calculations happen in your browser.
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 50 = (20 x 50) / 100 = 10.
How do I find what percent one number is of another?
Divide the first number by the second and multiply by 100. For example, 25 is 50% of 50 because (25/50) x 100 = 50.
How do I calculate percentage increase?
Subtract the original from the new value, divide by the original, and multiply by 100. For example, increase from 50 to 75 = ((75-50)/50) x 100 = 50%.
Is my data sent anywhere?
No. All calculations happen locally in your browser.
Can I calculate reverse percentages?
Yes! Use mode 1 and enter the percentage and result to find the original number.