Math calculators
Percentage Calculator: Calculate Percent Change, Discount, and More
Learn how to use a percentage calculator for percent changes, discounts, markups, tips, and other common percentage calculations.
Common percentage calculations
Percentage calculations are used in many scenarios: finding a discount price, calculating percent change, determining what percent one number is of another, and more. A percentage calculator makes these instant.
Discount and sale price calculation
To find the sale price after a discount, enter the original price and discount percentage. The calculator shows the discount amount and final price. Example: 30% off a $100 item = $70 final price.
Percent increase and decrease
Calculate percentage change from one value to another. Useful for year-over-year growth, investment returns, weight loss progress, and salary increases. Formula: ((New - Old) / Old) × 100%.
Everyday percentage uses
Use percentage calculations for tipping (15-20% of bill), tax calculations, commission calculations, and understanding statistics. Quick calculations save time and reduce errors.