Calculate percentages five different ways — find a percentage of a number, percentage change, discount, markup, and more. Instant results with step-by-step formulas.
How to use this tool
X% of Y — “What is 20% of 500?” → finds the percentage amount.
What % of Y is X — “45 is what % of 180?” → finds the percentage ratio.
% Change — “From 80 to 100, what is the % increase?” → finds growth or decline.
Discount — enter original price and % off to get the sale price and savings amount.
This percentage calculator is useful for students calculating exam scores and grades, shoppers finding discount prices and savings, business owners computing profit margins and markups, marketers measuring campaign growth rates, designers calculating color opacity or size ratios, and anyone who needs a quick, reliable percentage calculation without manually working out the formula.