Percentage Calculator
Percent of a number, what percent of, and percentage increase or decrease.
About This Tool
The Percentage Calculator handles the three most common percentage questions: finding a percent of a number, working out what percent one number is of another, and calculating the percentage increase or decrease between two values. Each block updates live as you type.
It is useful for discounts, marks, tips, tax, and growth figures, and runs entirely in your browser.
- check_circleFind X% of a number
- check_circleFind what percent one number is of another
- check_circleCalculate percentage increase or decrease
- check_circleLive, browser-based calculation
Frequently Asked Questions
How do I find a percentage of a number? expand_more
Multiply the number by the percentage and divide by 100. For example, 20% of 500 is 500 × 20 / 100 = 100. The first block does this for you.
How is percentage change calculated? expand_more
Percentage change is (new − old) / old × 100. A positive result is an increase and a negative result is a decrease.
Is it free? expand_more
Yes. The calculator is free and runs in your browser.