Text Tools
Utilities
Code Generators
Converters
Calculators
Made with ❤ by Codonist
Percentage Calculator
Calculate percentages instantly — find X% of Y, percentage change, and more
Calculate Percentages Instantly with the Free Percentage Calculator
Percentages are everywhere — in discounts, taxes, tips, statistics, and data analysis. Our free Percentage Calculator handles all common percentage scenarios in one clean interface, with instant results as you type and no signup required. Whether you need to find a percentage of a number, calculate what percent one number is of another, measure percentage change between two values, or add/subtract a percentage from a number, this tool covers it all. Each mode shows the underlying formula so you can learn how the calculation works. Students use it to check homework, shoppers calculate discounts on the fly, business owners track profit margins, and analysts compute growth rates. The calculator works on any device — desktop, tablet, or phone — and all calculations happen right in your browser with nothing sent to a server. Features include quick-example buttons to populate values instantly, a copy-result button for easy pasting, and a swap-values shortcut for the "what percent" mode.
Key Features
- Four calculation modes: find X% of Y, X is what % of Y, percentage change, add/subtract %
- Instant results as you type — no submit button needed
- Shows the formula so you understand how the answer was derived
- Quick example buttons to try common calculations
- Copy result to clipboard with one click
- Works offline — all calculations happen in your browser
- Responsive design for mobile, tablet, and desktop
Common Use Cases
- Shoppers calculating discounts and sale prices
- Students checking math homework and exam scores
- Business owners tracking profit margins and growth rates
- Developers computing responsive design percentages
- Anyone splitting bills, calculating tips, or analyzing data
Quick Examples:
Frequently Asked Questions
Use the 'What is X% of Y?' mode. Enter the percentage (X) and the number (Y). The result is (X ÷ 100) × Y. For example, 15% of 200 = (15 ÷ 100) × 200 = 30.
Use the 'X is what % of Y?' mode. Enter the part (X) and the whole (Y). The result is (X ÷ Y) × 100. For example, 50 is 25% of 200.
Percentage change measures the relative difference between an old value and a new value. The formula is ((New − Old) ÷ Old) × 100. A positive result means an increase, a negative result means a decrease.