Pythagorean Theorem Calculator

Find the missing side of a right triangle.

Input Parameters

Solve for

Leg a

Leg b

Missing side (c)5

Leg a3

Leg b4

Hypotenuse c5

Triangle area6

175 available

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Solve a² + b² = c² for the hypotenuse or either leg of a right triangle, with area shown.

Which side is missing?

Pick hypotenuse or a leg; the other two inputs must satisfy hypotenuse > leg.

Formula?

c = √(a² + b²); legs come from a = √(c² − b²).

Integer triples?

Classic 3-4-5 and 5-12-13 triples verify instantly — try them.