Pythagorean Theorem Calculator

Pythagorean Theorem Calculator

Calculate the missing side of a right triangle instantly with our free Pythagorean theorem calculator. Perfect for geometry homework, construction projects, and engineering calculations. Get step-by-step solutions and verify your results with common Pythagorean triples.

pythagorean
triangle
geometry
Quick Examples
Click a preset to load two sides, then calculate the missing side
1Triangle Side Lengths
Enter any two sides to calculate the third, or use a preset to verify a complete triangle
How it works: The Pythagorean theorem states that in a right triangle, a² + b² = c², where c is the hypotenuse (longest side). Enter any two sides to calculate the third, or use a preset to verify a complete triangle.
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Complete Guide: Pythagorean Theorem Calculator

Everything you need to know about using Pythagorean Theorem Calculator effectively

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