Math
Math: Percentages, fractions, circles, averages. Free, simple calculators with no sign-up.
Math
- Percentage calculatorWork out X% of a number, a percentage increase or decrease, or a share in %.
- Fraction calculatorAdd, subtract, multiply and divide fractions, simplified automatically.
- Circle calculator: area and circumferenceArea, circumference, radius and diameter of a circle from a single measurement.
- Average calculator (and weighted average)Mean, median and weighted average of a list of numbers.
- Online scientific calculatorType a calculation with sine, roots, logarithms or powers and see the answer at once.
- Simple online calculatorAdd, subtract, multiply, divide and use percentages, with the right order of operations.
- Triangle solver: sides, angles and areaGive three measurements of a triangle and get the other sides, the angles and the area.
- Volume calculator: cube, cylinder, sphere, cone…Volume of a cube, box, cylinder, sphere, hemisphere, cone or pyramid, also in litres.
- Standard deviation and variance calculatorStandard deviation and variance of a list of numbers, for a sample (n − 1) or a population (n).
- Random number generatorDraw one or more random whole numbers between two limits, with or without repeats.
- Arithmetic and geometric sequence calculatorThe n-th term and the sum of the first n terms of an arithmetic or geometric sequence.
- Quadratic equation solverSolve ax² + bx + c = 0: discriminant, real or complex roots.
- Slope of a lineSlope and equation of a line from two points or from ax + by = c.
- Logarithm calculatorLogarithm of a number in base 10, e (ln), 2 or any other base.
- Area calculator for shapesArea of a square, rectangle, triangle, trapezoid, rhombus, ellipse, polygon and more.
- Surface area of solidsSurface area of a cube, box, cylinder, cone, sphere or pyramid, open or closed.
- Sample size calculator (survey)How many people to survey, from the confidence level and the margin of error.
- Probability of two eventsProbability of A and B, A or B, at least one, neither, exactly one, from how A and B are linked.
- Z-score calculator (standard score)Z-score of a value and its position (percentile) on the bell curve.
- LCM calculator (least common multiple)The smallest number that is a multiple of all your numbers, with the steps.
- GCD calculator (greatest common divisor)The largest number that divides all your numbers, with Euclid’s steps.
- Divisors of a numberAll the divisors of a whole number, how many there are, their sum and the pairs.
- Prime factorization calculatorWrite a whole number as a product of prime numbers, with powers.
- Common divisors of several numbersEvery number that divides each of your numbers, and their GCD.
- Percent error calculatorHow far a measurement is from the expected value, in percent, with its sign.
- Exponent calculator (powers)A number to the power n: whole, negative, decimal or fraction exponent.
- Square root, cube root and nth root calculatorThe nth root of a number: square (n = 2), cube (n = 3) or any other, in real or complex mode.
- Binary calculatorAdd, subtract, multiply, divide and AND / OR / XOR in binary, with the decimal value.
- Hexadecimal calculatorAdd, subtract, multiply and divide in base 16, with the decimal and binary values.
- Half-life calculator (radioactive decay)Amount left, time elapsed, half-life or starting amount: find the unknown value.
- Ratio and proportion calculatorFind the missing term of a : b = c : d and simplify a ratio.
- Permutations and combinations (with or without repetition)How many ways to pick r items out of n, when order matters or not. Exact result.
- Long division calculator with stepsQuotient, remainder and every step of the long division, with decimals.
- Rounding calculator (5 rounding modes)Round half up, half to even, down, up or toward zero, to decimals or significant figures.
- Scientific notation converterWrite a number as a × 10ⁿ, in E notation and in engineering notation.
- Big number calculator (exact precision)Add, subtract, multiply or divide numbers hundreds of digits long, with no loss of precision.
- Descriptive statistics calculatorMean, median, quartiles, variance, standard deviation, minimum, maximum and range of a list of numbers.
- Mean, median, mode and range calculatorMean, median, mode (one or several) and range of a data set, with the sorted list.
- Confidence interval calculator (mean or proportion)Confidence interval for a mean (Student t or normal) or a proportion (Wilson).
- Distance between two points (2D or 3D)Straight-line distance between two points in the plane or in space, with the steps and the midpoint.
- Pythagorean theorem calculator: find the missing sideFinds the hypotenuse or a leg of a right triangle from the other two sides.
- Right triangle calculator: sides, angles and areaSolves a right triangle from two sides or a side and an angle: sides, angles, area, perimeter.
- Matrix calculator (up to 4 × 4)Add, subtract, multiply, determinant, inverse and transpose of matrices up to 4 × 4.
- P-value calculator (z, t, chi-square, F)P-value of a z, Student t, chi-square or Fisher F statistic, one- or two-tailed.