Math Calculators

Solve the classics — right triangles, quadratic roots, circle geometry, slopes and intercepts, powers and roots, counting problems and standard scores — with the intermediate steps shown, not just the answer. Useful for checking homework and for seeing where a result comes from.

• Pythagorean Theorem CalculatorFind the hypotenuse of a right triangle from its two legs — plus area and perimeter.
• Circle CalculatorArea, circumference and diameter of a circle from its radius.
• Triangle Area CalculatorThe area of any triangle from its base and height.
• Quadratic Formula CalculatorSolve ax² + bx + c = 0 — both roots and the discriminant, step by step.
• Slope CalculatorSlope, y-intercept and distance between two points on a line.
• Exponent CalculatorRaise any base to any power, including negative and fractional exponents.
• Root CalculatorSquare roots, cube roots and any nth root of a number.
• Percent Error CalculatorHow far a measured value is from the true value, as a percentage.
• GCF & LCM CalculatorGreatest common factor and least common multiple of two numbers.
• Combinations & Permutations CalculatorHow many ways to choose or arrange r items from a set of n.
• Z-Score CalculatorHow many standard deviations a value sits above or below the mean.