Maths calculators
Percentages, fractions, algebra, geometry, statistics and number tools.
Scientific CalculatorA full scientific calculator with trigonometry, logarithms, powers, roots, factorials, memory and a running tape of results.Percentage CalculatorWork out percentages three ways: a percentage of a number, one number as a percentage of another, and percentage change.Percentage Change CalculatorCalculate the percentage increase or decrease from an old value to a new value.Percentage Increase CalculatorIncrease or decrease a number by a percentage.Percentage Difference CalculatorFind the percentage difference between two values, relative to their average.Fraction CalculatorAdd, subtract, multiply or divide two fractions and get the answer in lowest terms.Fraction to Decimal CalculatorConvert a fraction into a decimal and a percentage.Decimal to Fraction CalculatorConvert a decimal number into a fraction in lowest terms.Simplify Fractions CalculatorReduce a fraction to its lowest terms and show it as a mixed number.Average CalculatorFind the average (mean) of a list of numbers, with the sum and count.Mean Median Mode CalculatorCalculate the mean, median, mode and range of a data set.Standard Deviation CalculatorCalculate sample and population standard deviation and variance for a data set.Ratio CalculatorSimplify a ratio and scale it to find a missing value.Proportion CalculatorSolve a proportion a/b = c/x for the missing value by cross-multiplication.LCM CalculatorFind the least common multiple (LCM) of two or more whole numbers.GCD and HCF CalculatorFind the greatest common divisor (GCD), also called the highest common factor (HCF), of two or more numbers.Prime Number CheckerCheck whether a number is prime and see its factors.Factor CalculatorList all the factors of a whole number and its factor pairs.Factorial CalculatorCalculate the factorial n! of a whole number.Permutation and Combination CalculatorCalculate permutations (nPr) and combinations (nCr).Exponent CalculatorRaise a number to any power, including negative and fractional exponents.Square Root CalculatorFind the square root of a number and check whether it is a perfect square.Cube Root CalculatorFind the cube root, or any other root, of a number.Logarithm CalculatorCalculate the logarithm of a number to any base, with natural and base-10 logs.Quadratic Equation SolverSolve ax² + bx + c = 0 for real or complex roots, with the discriminant and vertex.Linear Equation SolverSolve a linear equation of the form ax + b = c.Simultaneous Equations SolverSolve two linear equations in two unknowns: a₁x + b₁y = c₁ and a₂x + b₂y = c₂.Pythagorean Theorem CalculatorFind the hypotenuse of a right triangle from the two shorter sides, with the angles and area.Circle CalculatorCalculate the area, circumference and diameter of a circle from its radius.Triangle Area CalculatorFind the area of a triangle from its base and height.Triangle CalculatorSolve a triangle from its three sides: area by Heron's formula, perimeter and all three angles.Rectangle CalculatorCalculate the area, perimeter and diagonal of a rectangle.Square CalculatorCalculate the area, perimeter and diagonal of a square from one side.Trapezoid Area CalculatorFind the area of a trapezoid (trapezium) from its parallel sides and height.Parallelogram Area CalculatorFind the area and perimeter of a parallelogram.Ellipse Area CalculatorCalculate the area and approximate perimeter of an ellipse.Sector Area CalculatorFind the area and arc length of a sector of a circle.Regular Polygon CalculatorCalculate the area, perimeter and angles of a regular polygon.Cylinder Volume CalculatorCalculate the volume and surface area of a cylinder.Sphere Volume CalculatorCalculate the volume and surface area of a sphere.Cone Volume CalculatorCalculate the volume, slant height and surface area of a cone.Cube and Box Volume CalculatorCalculate the volume, surface area and diagonal of a cube or rectangular box.Pyramid Volume CalculatorCalculate the volume of a pyramid with a rectangular base.Slope CalculatorFind the slope, angle and equation of the line through two points.Distance Between Two Points CalculatorCalculate the straight-line distance between two points on a plane.Midpoint CalculatorFind the midpoint of the line segment joining two points.Scientific Notation ConverterConvert a number into scientific and engineering notation.Rounding CalculatorRound a number to a chosen number of decimal places or to the nearest ten, hundred or thousand.Random Number GeneratorGenerate random whole numbers in any range. Press Calculate for a new set.Roman Numeral ConverterConvert numbers to Roman numerals and Roman numerals back to numbers.Number to Words ConverterWrite any number in English words, in both the international and the South Asian (lakh and crore) systems.Arithmetic Sequence CalculatorFind the nth term and the sum of an arithmetic sequence.Geometric Sequence CalculatorFind the nth term and the sum of a geometric sequence.Modulo CalculatorFind the remainder and quotient when one number is divided by another.Z Score CalculatorCalculate the z-score of a value from the mean and standard deviation.Probability CalculatorCalculate the probability of two independent events: both, either, neither and exactly one.Trigonometry CalculatorFind the sine, cosine, tangent and their reciprocals for any angle.Matrix Determinant CalculatorCalculate the determinant and trace of a 3 × 3 matrix.Integral CalculatorEvaluate a definite integral numerically with Simpson's rule. Type the function in terms of x.Derivative CalculatorFind the numerical derivative (slope) of a function at a point. Type the function in terms of x.