Percentage Calculator
Three common percentage questions answered in one small form.
Runs entirely in your browser. Nothing you type is uploaded.
About this tool
Pick the question you actually have: what is X% of Y, X is what percent of Y, or what is the percentage change from X to Y. Each mode shows the result and the arithmetic behind it, so you can check it rather than trust it.
Questions & answers
- How do I calculate a discount?
- Use "what is X% of Y" with the discount rate and the original price to get the amount off; the tool also shows the remaining price.
- Why is a rise from 50 to 100 shown as +100%?
- Percentage change is measured against the starting value: the increase of 50 is 100% of the original 50.
- Does this tool send my data to a server?
- Runs entirely in your browser. Nothing you type is uploaded.