Percentage Calculator

Three Everyday Percentage Problems

This calculator covers the three questions people ask most: “What is X% of Y?” (multiply Y by X/100), “X is what percent of Y?” (divide X by Y, times 100), and “What is the percentage change from X to Y?” (the difference divided by the original value). Useful for discounts, tips, grades, and growth rates. Every result updates instantly and is computed locally.