Percentages, fractions, averages, ratios, and right triangles — with the working shown.
Find a percent of a number, what percent one number is of another, or percent change.
Open calculatorAdd, subtract, multiply, and divide fractions, with simplified and mixed-number answers.
Open calculatorMean, median, mode, range, and standard deviation for any list of numbers.
Open calculatorFind the hypotenuse or a missing leg of a right triangle.
Open calculatorSimplify ratios and scale them up or down to find a missing value.
Open calculatorSolve ax² + bx + c = 0, including complex roots.
Open calculatorRaise numbers to any power or take any root.
Open calculatorStandardize a value and find its percentile in a normal distribution.
Open calculatorConvert numbers between binary, octal, decimal, and hexadecimal.
Open calculatorEveryday math, done clearly: percentages, fractions, averages, ratios, and right triangles. Every result shows the formula used, so you can check the working or learn the method.
These tools also help with project math — like scaling a mix ratio or squaring a corner with the 3-4-5 rule.