Pythagorean Theorem Calculator

The Pythagorean Theorem Calculator is a free, user-friendly online tool designed to help users quickly and accurately calculate the missing side of a right triangle using the fundamental formula a² + b² = c². Whether you need to find the hypotenuse or one of the legs, this calculator simplifies the process by allowing you to input any two known side lengths and instantly receive the third. It supports multiple unit systems including decimal numbers, feet & inches, meters, and centimeters, making it versatile for students, teachers, engineers, contractors, and builders alike. The tool also provides step-by-step solutions, enhancing understanding and learning. Its mobile-friendly interface ensures accessibility on any device, and it requires only a web browser with JavaScript enabled. Ideal for educational purposes, construction projects, and engineering tasks, this calculator streamlines the application of the Pythagorean theorem in practical scenarios.