Pythagorean Theorem Calculator
Calculate the missing side of a right triangle using a² + b² = c². Enter any two sides to find the third.
How to Use Pythagorean Theorem Calculator
The Pythagorean Theorem Calculator is a free online tool that finds the missing side of a right triangle using the formula a² + b² = c². Enter any two of the three sides (side a, side b, or hypotenuse c) and the calculator finds the third. It shows the step-by-step formula with your values substituted in. Whether you are a student solving geometry homework, a carpenter checking if corners are square, an architect calculating diagonal distances, a game developer computing distances, or anyone working with right triangles, this tool provides instant accurate results with the full calculation shown.
Step-by-Step Instructions
- Enter two of the three sides (leave one empty)
- Side a and b are the legs, c is the hypotenuse
- Click Calculate to find the missing side
- View the result with the step-by-step formula
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