Math tools
Calculators, converters, and solvers for everyday math.
16 tools
Average Speed CalculatorFind the true average speed of a trip driven at different speeds — up to three legs, with or without stops.Circle CalculatorEnter the radius, diameter, circumference or area of a circle and get the other three, with the working shown.Fraction CalculatorAdd, subtract, multiply or divide two fractions and get the simplified answer, mixed number and decimal.LCM and GCF CalculatorFind the least common multiple (LCM) and greatest common factor (GCF) of 2 to 4 numbers, with prime factors and Euclid’s steps.Mean, Median and Mode CalculatorFind the mean (average), median, mode and range of up to 12 numbers, with the sorted list and the working shown.Percentage Change CalculatorSee the percentage increase or decrease between two values, plus the absolute difference.Percentage Point CalculatorSee the difference between two percentages in percentage points and in percent — or add points or a percent to a rate.Pythagorean Theorem CalculatorFind the hypotenuse or a missing side of a right triangle with a² + b² = c² — plus the angles, area and perimeter.Quadratic Equation CalculatorSolve ax² + bx + c = 0 with the quadratic formula: real or complex roots, discriminant, vertex and factored form, with working.Ratio CalculatorSolve a proportion A : B = C : ? and simplify a ratio to its lowest terms.Speed Distance Time CalculatorSolve for speed, distance or time from the other two, in kilometres or miles.Standard Deviation CalculatorFind the sample or population standard deviation, variance and mean of up to 15 numbers, with the working shown.Time CalculatorAdd or subtract hours, minutes and seconds — get the total as h:mm:ss, in decimal hours and in words.Triangle CalculatorSolve any triangle from three sides, two sides and the angle between them, or two angles and a side — angles, area, perimeter and heights.Volume CalculatorCalculate the volume and surface area of a sphere, hemisphere, cone, truncated cone or pyramid — in cubic units and litres.Weighted Average CalculatorCalculate a weighted average (weighted mean) from up to 8 values and their weights — grades, scores or prices.