Pythagorean Theorem Calculator

Calculate missing sides of right triangles using the Pythagorean theorem: a² + b² = c²

Find Hypotenuse (c)

Given two legs (a and b)

c = √(a² + b²)

Find Leg (a)

Given leg b and hypotenuse c

a = √(c² - b²)

Find Leg (b)

Given leg a and hypotenuse c

b = √(c² - a²)

Side a (leg):

units

Side b (leg):

units

Quick Examples:

Side a (leg):

Side b (leg):

Side c (hypotenuse):

Triangle Area:

Triangle Perimeter:

Blue lines: Legs (a, b) | Red line: Hypotenuse (c) | Green: Right angle marker