Math

Rule of three, fractions, averages, equations, trigonometry, sequences, combinations: maths calculators that also show the method, perfect for homework.

16 calculators
Rule of three calculatorSolve a proportion: if A gives B, what does C give?Open →
Average calculatorMean, median, minimum, maximum and sum of a list of numbers.Open →
GCD and LCM calculatorGreatest common divisor and least common multiple of several numbers.Open →
Fraction calculatorAdd, subtract, multiply or divide two fractions, with a simplified result.Open →
Roman numeral converterConvert numbers to Roman numerals and back (1 to 3999).Open →
Quadratic equation solverSolve ax² + bx + c = 0: discriminant, roots and vertex of the parabola.Open →
Pythagorean theorem calculatorFind the missing side of a right triangle, its area and angles.Open →
Area and volume of shapesCircle, sphere, cylinder, cone, cube: area, perimeter and volume.Open →
Prime checker and factorizationCheck whether a number is prime and break it into prime factors.Open →
Powers, roots and logarithmsx to the power n, square and nth roots, logarithms and scientific notation in one place.Open →
System of two equations solverSolve ax + by = c and dx + ey = f, with the steps (Cramer's rule).Open →
Rounding calculatorRound to nearest, down or up, to n decimal places or n significant figures.Open →
Combinations and permutationsHow many ways to choose k items from n, with or without order or repetition.Open →
Trigonometry calculatorsin, cos, tan of an angle in degrees or radians, and the inverse functions.Open →
Arithmetic and geometric sequencesThe nth term and the sum of a sequence, with the first terms listed.Open →
Decimal to fraction converterTurn 0.375 into 3/8 or 0.333… into 1/3, with the simplified fraction and percentage.Open →