Calculate percentages quickly and easily
Percentages are one of the most commonly used mathematical concepts in daily life. From calculating discounts while shopping to figuring out tax amounts, tips at restaurants, or analyzing data trends, percentage calculations come up constantly. Our free Percentage Calculator handles the four most common percentage operations in a single, easy-to-use interface that calculates results instantly as you type.
The first section answers "What is X% of Y?" — useful for discounts, tips, or commissions. The second reverses the question: "X is what percent of Y?" — perfect for test scores or budget analysis. The third computes percentage change between two values, essential for tracking growth rates or price changes. The fourth increases or decreases a value by a percentage, helpful for markups or salary adjustments. All calculations happen instantly in your browser with no data sent to any server.