Math
Pythagorean Theorem Calculator
Solve for the hypotenuse or a missing leg using c² = a² + b².
Inputs
Pythagorean Theorem Calculator
Result
Hypotenuse c
5
- c²
- 25
How it's calculated
c = √(a² + b²). a = √(c² − b²).
Common questions
When does the theorem apply?
Only for right triangles — triangles containing a 90° angle.
What if c is smaller than a leg?
That's impossible in a right triangle. The hypotenuse is always the longest side.
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