Math calculators
Percentages and everyday maths, with the working shown.
- Fraction CalculatorAdd, subtract, multiply and divide fractions, simplified, with mixed numbers and decimals.
- Average CalculatorMean, median, mode, range and standard deviation of any list of numbers.
- Percentage CalculatorFind X% of a number, what percent one number is of another, or the percentage change between two numbers.
- Ratio CalculatorSolve A : B = C : D, and simplify a ratio to whole numbers.
- Area CalculatorArea of a rectangle, circle, triangle, trapezoid, parallelogram or ellipse, in square metres and feet.
- Volume CalculatorVolume and litres held by a box, cylinder tank, sphere, cone or pyramid.
- Quadratic Equation CalculatorSolve ax² + bx + c = 0 with the discriminant, real or complex roots and the vertex.
- Exponent, Root and Log CalculatorPowers, square and cube roots, any n-th root, and logarithms in any base.
- Random Number GeneratorPick one or many random whole numbers in any range, with or without repeats, and share the draw.
- Speed, Distance and Time CalculatorFind travel time, average speed or distance from the other two, in km/h, mph or m/s.
- HCF and LCM CalculatorThe highest common factor (GCD) and least common multiple of two or more whole numbers.
- Prime Factorization CalculatorCheck whether a number is prime, and break it into prime factors with its number of divisors.
- Permutation and Combination CalculatornCr and nPr: how many ways to choose or arrange r items from n, with or without repeats.
- Rounding CalculatorRound to decimal places, significant figures or the nearest 10, 100 or 1,000, including banker's rounding.
- Scientific Notation ConverterWrite any number in scientific, E and engineering notation, or back out in full.
- Right Triangle CalculatorThe missing side by Pythagoras, plus both angles, the area and the perimeter.