Math
Math tools cover the percentage, average and ratio questions people actually search for. Formulas are shown on each page so you can check the method, not just the result, and every calculation runs in your browser.
Tools in this category
8 tools
Percentage Calculator
Calculate percentages three ways: find a percentage of a number, find what percent one number is of another, or find the total when you know a part and a percentage.
Percentage Change
Find how much a value increased or decreased as a percentage of the original amount.
Discount Calculator
Work out the amount saved and the sale price from an original price and a percent off.
Markup Calculator
Add a markup percent to cost to get the markup amount and selling price.
Margin Calculator
From cost and selling price, see profit, margin percent and markup percent.
Average Calculator
Find the arithmetic mean, count and sum of a list of numbers pasted or typed in your browser.
Ratio Calculator
Simplify two numbers to lowest terms and see the decimal relationship A ÷ B.
Fraction to Decimal
Convert a numerator and denominator into a decimal and a percentage.