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Pythagorean Theorem Calculator

Find the hypotenuse of a right triangle from its two perpendicular legs.

Hypotenuse c: -
Visual representation

Pythagorean Theorem Calculator diagram

The diagram updates with your entries and is illustrative, not necessarily drawn to scale.

Calculation explained

How this result was calculated

The formula, your substituted values, and the evaluated result are shown below.

The two entered sides must meet at a 90-degree angle. Lengths must use the same unit.
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How the Pythagorean Theorem Calculator works

Find the hypotenuse of a right triangle from its two perpendicular legs.

Formula

√(legA × legA+legB × legB)

How to use this calculator

  1. Enter every measurement using one consistent length or angle unit.
  2. Select Calculate to evaluate the formula.
  3. Review the substituted values in the calculation explanation.

Interpretation and limitations

The two entered sides must meet at a 90-degree angle. Lengths must use the same unit. Decimal answers are rounded for display; retain additional precision for subsequent calculations.

Geometry collection

This calculator belongs to the Plane Geometry section of the Math calculator library.

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