Only right triangles?

Yes—Pythagorean theorem applies to right triangles.

Lengths must be positive—enter magnitudes only.

Extend with an extra perpendicular leg (3D distance formula).

CalculatorNut

Pythagorean Theorem Calculator

Last updated: April 5, 2026

Find

Leg a

Leg b

Hypotenuse c

5.000000

Calculator by CalculatorNut

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How to Use

Choose whether you know two legs or hypotenuse and one leg, then enter values.

Formula

c = √(a² + b²) for legs a,b; leg = √(hypotenuse² − other leg²)

FAQ

Only right triangles?: Yes—Pythagorean theorem applies to right triangles.
Negative lengths?: Lengths must be positive—enter magnitudes only.
3D distance?: Extend with an extra perpendicular leg (3D distance formula).

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