Percentage Calculator

Calculate percentages, percentage change, and percentage increase or decrease.

CHOOSE A CALCULATION

Enter your numbers above to see the result.

What this tool does

A percentage calculator handles the three most common percentage questions in one tool — finding a percentage of a number, working out what percentage one number is of another, and calculating the percentage increase or decrease between two values.

How it works

  1. Choose the calculation you need: “% of a number,” “X is what % of Y,” or “% change.”
  2. Enter the numbers for that calculation.
  3. The result updates instantly as you type, with no need to press a button first.
Example: Using “% change” to go from 80 to 100 shows a 25% increase; using “% of a number” for 25% of 80 shows 20.
Yes. The percentage calculator is completely free, with no signup, no watermark, and no limit on how many times you use it.
It uses the standard published formula for this calculation, so results match what you'd get doing the math by hand — instantly and without the risk of a manual error.
Yes — it's fully responsive and works the same on mobile, tablet, or desktop, with no app to download.
No. Your inputs are used only to calculate your result in the browser and aren't stored or sent anywhere.
Yes — "percentage calculator" and "percent calculator online" describe the same task. This page is built to handle that search directly, without redirecting you elsewhere.