Percentage Calculator
Calculate percentages with four modes: percentage of a number, what percent X is of Y, percentage change, and add/subtract percent. Free tool.
percentWhat is X% of Y?
helpX is what % of Y?
trending_up% Change from X to Y
calculateAdd/Subtract X% to Y
About this tool
The Percentage Calculator provides four common calculation modes. Find what percentage one number is of another, calculate percentage change between two values, find a percentage of a number, or add/subtract a percentage. Results update as you type.
Useful for shopping discounts, tax calculations, tip calculations, data analysis, and academic work. All calculations run in your browser.
Frequently Asked Questions
What calculation modes are available?
Four modes: What is X% of Y, X is what % of Y, percentage increase/decrease between two numbers, and add/subtract a percentage to a number.
How is percentage change calculated?
Percentage change = ((New - Old) / Old) x 100. A positive result means increase, negative means decrease.
Can I calculate tips?
Yes. Use the first mode: What is 15% of $50 = $7.50. Or use the fourth mode: $50 + 15% = $57.50.