Percentage Calculator
Calculators
100% in-browser
Answer the three most common percentage questions instantly — no formulas to remember.
Result
How to use the Percentage Calculator
- 1 Choose the type of percentage question.
- 2 Enter your two numbers.
- 3 The answer updates live as you type.
About the Percentage Calculator
Percentages come up constantly — discounts, tips, tax, grades, statistics — but the formula is easy to forget. This calculator handles the three questions people ask most: what is X% of Y, X is what percent of Y, and the percentage increase or decrease from one value to another.
Each answer updates live as you type, entirely in your browser. It is a quick, reliable way to check figures without opening a spreadsheet.
Frequently asked questions
How do I calculate percentage increase?
Subtract the old value from the new value, divide by the old value, and multiply by 100. This tool does it for you.
Can it calculate a discount?
Yes — use "what is X% of Y" to find the discount amount for a given percentage off.
Related tools
More from us
