Four common percentage calculations — all in one place. Quick, easy, and free.
Percentages come up constantly in everyday life — shopping discounts, tax rates, investment returns, grade calculations, and tipping. This tool covers the four most common percentage calculations people search for, all on a single page with instant results.
The first calculation answers "What is X% of Y?" — useful for calculating discounts, tips, and tax amounts. The second answers "X is what percent of Y?" — useful for understanding proportions and performance metrics. The third calculates percentage change between two numbers — essential for tracking investment returns, price changes, and growth rates. The fourth shows the result of increasing or decreasing a number by a given percentage.
All calculations update instantly as you type, with no need to click a button. The results are displayed in large, clear numbers so they are easy to read on any device. Whether you are a student working through math problems, a shopper calculating a sale price, or a business owner analyzing growth metrics, these four calculations cover the vast majority of percentage needs.