Percentage Calculator
Three modes: X% of Y, X is what % of Y, percent change from X to Y.
What is% of?
About Percentage Calculator
The Percentage Calculator handles the three percentage questions that come up most often. One mode finds X percent of a number, another tells you what percent one number is of another, and the third works out the percent change between a starting value and an ending value. Pick a mode, fill in the two figures, and the answer appears immediately.
The arithmetic runs in your browser, so the numbers you enter stay on your device. It is useful for figuring out discounts, comparing values, or measuring growth and decline without setting up a spreadsheet formula.
Frequently asked questions
- How do I calculate a discount?
- Use the X percent of Y mode to find the discount amount, then subtract it from the original price.
- What does percent change show?
- It shows how much a value rose or fell relative to the starting number, expressed as a positive or negative percentage.
- Can it handle negative numbers?
- Yes. Negative values are accepted, which is useful when measuring a decrease from a higher starting point.