Math Calculators
29 free calculators that show their work. Engine-backed tools give full step-by-step solutions with verification.
Algebra
Algebra CalculatorFree algebra calculator that solves equations, simplifies expressions and factors polynomials with verified step-by-step solutions.Equation SolverSolve linear, quadratic, polynomial, rational, radical, exponential, logarithmic and trigonometric equations step by step.Quadratic Formula CalculatorSolve ax² + bx + c = 0 with the quadratic formula. Shows the discriminant, exact roots, decimal values and factoring.System of Equations CalculatorSolve systems of 2 or 3 linear (or nonlinear) equations with Gaussian elimination, substitution and Cramer's rule.Inequality CalculatorSolve linear, compound, polynomial and rational inequalities with sign charts and interval notation.Factoring CalculatorFactor polynomials completely: GCF, trinomials, difference of squares, sum of cubes and higher-degree polynomials.Simplify CalculatorSimplify algebraic, rational, exponential, logarithmic and trigonometric expressions step by step.Logarithm CalculatorEvaluate logarithms in any base and solve logarithmic equations step by step.
Calculus
Derivative CalculatorDifferentiate functions step by step using the power, product, quotient and chain rules. Supports higher-order and partial derivatives.Integral CalculatorCompute indefinite and definite integrals step by step: power rule, substitution, integration by parts and partial fractions.Limit CalculatorEvaluate limits step by step, including one-sided limits, limits at infinity and indeterminate forms with L'Hôpital's rule.
Arithmetic & Numbers
Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers with steps and simplified answers.Percentage CalculatorCalculate percentages, percentage of a number, and percent increase or decrease instantly with steps.GCF CalculatorFind the greatest common factor (GCD) of two or more numbers using prime factorization and the Euclidean algorithm.LCM CalculatorFind the least common multiple of two or more numbers with prime factorization steps.Exponent CalculatorRaise any number to any power, including negative and fractional exponents, with explanations.Scientific CalculatorFree online scientific calculator with trig, logs, powers, roots, factorials, memory and degree/radian modes.
Geometry
Slope CalculatorFind the slope, equation of the line, distance and midpoint between two points.Area CalculatorCalculate the area (and perimeter) of rectangles, squares, circles, triangles, trapezoids, parallelograms and ellipses.Volume CalculatorFind the volume and surface area of cubes, boxes, spheres, cylinders, cones and pyramids.Pythagorean Theorem CalculatorFind the hypotenuse or a missing leg of a right triangle using a² + b² = c².
Statistics & Probability
Statistics CalculatorDescriptive statistics: mean, median, mode, range, variance, standard deviation and quartiles with steps.Standard Deviation CalculatorCompute sample and population standard deviation and variance step by step.Probability CalculatorProbability of two independent events: intersection, union, complement, exactly one and neither.Combination & Permutation CalculatorCompute combinations (nCr), permutations (nPr) and factorials with formulas and steps.