Calculate percentages online for free: X% of Y, percentage change, and what percent X is of Y. Instant answers in your browser. No signup required.
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Percentages are everywhere — discounts, tips, taxes, raises, grades, statistics — and yet they're surprisingly easy to fumble under pressure. Our free Percentage Calculator handles the three questions that cover nearly every real situation: what is X% of Y, X is what percent of Y, and what's the percentage change from A to B.
Each mode computes live as you type, labels increases and decreases clearly, and accepts decimals throughout. Shoppers use it to verify sale prices, freelancers to add tax or calculate margins, students to convert scores, and analysts to express deltas correctly (the change from 50 to 75 is +50%, not 25 — the calculator keeps you honest).
Like all our utilities, the math runs entirely in your browser, instantly and offline. For money math over time, see the Loan EMI Calculator; for converting the units behind your numbers, the Unit Converter; and for one specific famous ratio, the BMI Calculator.
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