Pythagorean Theorem Calculator

Given the two legs of a right triangle, calculate the length of the hypotenuse using the Pythagorean theorem.

Inputs
Results
Hypotenuse
5 units

Try an example

Formula

c = √(a² + b²)

Learn How This Works

Core Math Formulas Everyone Should Know (With Real Examples)

Percentages, the quadratic formula, and the Pythagorean theorem explained with step-by-step worked examples.

The Quadratic Formula, Explained Step by Step

How to solve any quadratic equation using the quadratic formula, including what a negative discriminant actually means.

Frequently Asked Questions

Related Calculators

Triangle Area Calculator

Calculate a triangle's area from three side lengths using Heron's formula.

Percentage Calculator

Find what percentage one number is of another, or calculate percentage change.

Percentage Change Calculator

Calculate the percentage increase or decrease between two values.

Quadratic Equation Solver

Solve ax² + bx + c = 0 for real roots using the quadratic formula.

Average (Mean) Calculator

Calculate the average of up to 10 numbers.

Standard Deviation Calculator

Calculate the population standard deviation of up to 5 numbers.