Free math calculators with step-by-step solutions

These math calculators show the answer and every step: fractions, linear and quadratic equations, GCF and LCM, prime factorization, weighted averages, GPA and final grades. They were designed by a math teacher to help you understand, not just copy.

Scientific calculatorOrder of operations, parentheses, trig, logs, roots, powers and factorials in degrees or radians.Fraction calculatorAdd, subtract, multiply, divide and simplify fractions with every step shown.Quadratic equation solverSolve linear and quadratic equations with the discriminant, exact roots and every step.GCF and LCM calculatorGreatest common factor and least common multiple of up to 6 numbers, with Euclid and prime factors.Prime factorization calculatorBreak any whole number into primes with a factor tree, division table and list of divisors.Percent change calculatorPercent increase or decrease between two numbers, apply a rate, find the original, chain changes.Weighted average calculatorWeighted grade with each score's share and the score needed to reach a target grade.GPA calculatorWeighted and unweighted GPA on a 4.0 scale with credits, honors, AP and cumulative GPA.Final grade calculatorFind the score you need on your final exam to reach the course grade you want.Percent to GPA converterConvert a percentage grade or a letter grade to GPA on the 4.0 scale, and back.