Math calculators

Free math calculators with the working shown: percentages, greatest common factor, averages and weighted averages.

• Percentage CalculatorFour percentage calculators in one: X% of Y, what percent X is of Y, find the whole, and percentage change.
• GCF CalculatorGreatest common factor of two or more numbers, with prime factorization and the Euclidean algorithm.
• Average CalculatorMean, median, mode and range of any list of numbers. Paste straight from a spreadsheet.
• Weighted Average CalculatorWeighted averages for grades, GPA, prices and scores, with a full working table.