Percentage Calculator
Calculate percentages, percentage change, discounts and common percentage problems instantly in your browser.
About Percentage Calculator
Calculate percentages, percentage change, discounts and common percentage problems instantly in your browser. NeroTool keeps this workflow simple and browser-based. Where supported, processing happens locally in your browser.
How to use this tool
Enter the two numbers for a percentage-of calculation, or the two values for a percentage-change calculation, then select Calculate. Both panels work independently, so you can use one without filling in the other.
Percentage vs. percentage change
These are two different questions. “What is X% of Y?” gives a portion of a value, while a percentage change measures how much a value increased or decreased relative to its starting point. Confirming which one you need before reading the result avoids the most common percentage mistake.
Privacy
This tool is designed to work in your browser. NeroTool does not require an account for this workflow.
Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100, or enter both values directly into the calculator to get the result instantly.
What is the difference between percentage and percentage change?
A percentage of a value is a portion of that value, while percentage change measures how much a value increased or decreased relative to its starting point.
Can I calculate a discount with this tool?
Yes, entering the original price and the discount percentage shows the amount saved and the final price.
Is my data uploaded anywhere?
The calculator runs in your browser, so the numbers you enter are not intentionally sent to a NeroTool server.