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Diagonal of Rectangle Calculator

Find the diagonal of a rectangle. Free online calculator with instant results — no login needed.

Diagonal

What is the Diagonal of Rectangle Calculator?

Find the diagonal of a rectangle. Free online calculator with instant results — no login needed.

Enter your values above and the result updates instantly. Uses the Pythagoras theorem.

Formula

Diagonal = √(length² + width²)

Example

Diagonal

FAQs

Example?

8×6 → 10.

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