Percentage Calculator
A fast percentage calculator with three modes: find a percent of a number, work out what percent one number is of another, and measure percent change.
Three percent questions, one tool
Business throws percentages at you all day: a percent off a price, what share one figure is of another, and how much something rose or fell. This calculator handles all three. Pick a mode and enter two numbers. It removes the mental math so you avoid the small errors that creep in when you are rushing.
The three modes
The first mode finds a percent of a number, useful for discounts, tips and commissions. The second tells you what percent one number is of another, handy for shares, completion rates and budgets. The third measures percent change between two figures, the right tool for growth, price moves and performance. Each gives an instant answer with a plain-language caption.
How to use it
Select the mode that matches your question, then enter the two values. The result and a short caption appear straight away. For revenue or sales changes specifically, the Revenue Growth Calculator frames percent change around periods, and the Discount Calculator handles pricing offers.
Frequently Asked Questions
How do I find a percent of a number?
Divide the percent by 100 and multiply by the number. For 20 percent of 250, that is 0.2 times 250, which is 50.
How do I find what percent one number is of another?
Divide the first number by the second and multiply by 100. The second mode does this for you.
How do I calculate percent change?
Subtract the old value from the new, divide by the old value, then multiply by 100. The third mode handles it.
Is it free?
Yes, free and private in your browser.