Pythagorean Theorem Calculator
Calculate missing sides of right triangles using the Pythagorean theorem with validation
About this calculator
The Pythagorean Theorem Calculator helps you find missing sides of right triangles using the famous a² + b² = c² formula. This tool is essential for students, engineers, architects, and anyone working with right triangles in construction, navigation, or mathematics. Simply input any two known sides (legs or hypotenuse), and the calculator instantly computes the missing third side with built-in validation to ensure your triangle measurements are mathematically correct and physically possible.
How to use
Enter the lengths of any two known sides of your right triangle into the input fields. Leave the unknown side blank. Click 'Calculate' and the tool will automatically determine whether you're solving for a leg or the hypotenuse, apply the appropriate Pythagorean theorem formula, and display the missing side length with validation.
Frequently asked questions
What is the Pythagorean theorem formula?
The Pythagorean theorem states that a² + b² = c², where 'a' and 'b' are the legs and 'c' is the hypotenuse of a right triangle.
Can I use this calculator for non-right triangles?
No, this calculator only works for right triangles (triangles with a 90-degree angle). Other triangle types require different formulas like the law of cosines.
What units can I use with this calculator?
You can use any units (inches, feet, meters, etc.) as long as all measurements use the same unit. The result will be in the same unit.