Percentage Calculator
Calculate percentages quickly and easily
About the Percentage Calculator
The Percentage Calculator finds a given percentage of any number, such as 15% of 80. It is useful for discounts, tips, tax, exam scores and statistics.
How it works
The result is value × percentage ÷ 100. For example, 15% of 80 is 80 × 15 ÷ 100 = 12. To find the price after a 15% discount, subtract that result from the original value (80 − 12 = 68).
How to Use Percentage Calculator
Enter Your Data
Enter the base value.
Run the Tool
Enter the percentage.
Use the Result
Press Calculate to get the result.
Why Use Our Percentage Calculator?
100% Free
No registration, no hidden fees, no limits — ever.
Privacy First
All processing runs in your browser. Your data never leaves your device.
Mobile Friendly
Works perfectly on phones, tablets, and desktops.
Instant Results
Results appear as soon as you run the tool.
Frequently Asked Questions
Q. How do I work out what percentage one number is of another?
Divide the part by the whole and multiply by 100. For example, 12 out of 80 is 12 ÷ 80 × 100 = 15%.
Q. How do I calculate a percentage increase?
Subtract the old value from the new value, divide by the old value, and multiply by 100. Going from 80 to 92 is a 15% increase.
Q. Can I use decimals?
Yes. Both the value and the percentage can be decimals, such as 7.5% of 249.99.