Pythagorean Theorem Calculator
Solve for any side of a right triangle using a² + b² = c². Instantly calculates sides, angles, area, and perimeter.
Pythagorean Triples (click to load)
Enter Values
Result
Enter two sides to calculate the third
About the Pythagorean Theorem
The Pythagorean theorem is one of the most famous equations in mathematics: a² + b² = c². It describes the relationship between the three sides of any right triangle, where c is the hypotenuse (the side opposite the 90° angle).
Find c (hypotenuse)
c = √(a² + b²)
Find a (leg)
a = √(c² − b²)
Find b (leg)
b = √(c² − a²)
Frequently Asked Questions
Related Tools
Square Root Calculator
Calculate square roots, cube roots, and nth roots. Shows simplified radical form (e.g. 6√2) and detects perfect squares.
Surface Area Calculator
Calculate surface area of 6 shapes: sphere, cube, cylinder, cone, rectangular prism, and square pyramid. Step-by-step solutions.
Aspect Ratio Calculator
Simplify a width:height ratio (e.g. 1920x1080 to 16:9) or solve for a missing dimension from a target ratio. Free tool for video, photo, and design.
Depth of Field & Hyperfocal Distance Calculator
Calculate hyperfocal distance and the near/far limits of acceptable sharpness from focal length, aperture, subject distance, and sensor format. Free, instant.
Sudoku Solver
Solve any 9x9 Sudoku puzzle instantly in your browser. Type digits into the grid or paste a puzzle string, plus a built-in validator to check for conflicts.