Rectangle Diagonal Calculator Reference Values

Calculate rectangle diagonal using the Pythagorean theorem d = √(l² + w²).

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Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

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Reference Value Index

This page lists 25 reference values for quick browsing and lookup.

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All Reference Values

Reference Table

Rectangle Diagonal Calculator reference values
Scenario	Diagonal
1 units Length; 1 units Width	1.414214 units
1 units Length; 3 units Width	3.162278 units
1 units Length; 6 units Width	6.082763 units
1 units Length; 12 units Width	12.041595 units
1 units Length; 24 units Width	24.020824 units
2 units Length; 1 units Width	2.236068 units
2 units Length; 3 units Width	3.605551 units
2 units Length; 6 units Width	6.324555 units
2 units Length; 12 units Width	12.165525 units
2 units Length; 24 units Width	24.083189 units
5 units Length; 1 units Width	5.09902 units
5 units Length; 3 units Width	5.830952 units
5 units Length; 6 units Width	7.81025 units
5 units Length; 12 units Width	13 units
5 units Length; 24 units Width	24.515301 units
10 units Length; 1 units Width	10.049876 units
10 units Length; 3 units Width	10.440307 units
10 units Length; 6 units Width	11.661904 units
10 units Length; 12 units Width	15.620499 units
10 units Length; 24 units Width	26 units
20 units Length; 1 units Width	20.024984 units
20 units Length; 3 units Width	20.223748 units
20 units Length; 6 units Width	20.880613 units
20 units Length; 12 units Width	23.323808 units
20 units Length; 24 units Width	31.240999 units

Frequently Asked Questions

Frequently asked questions for Rectangle Diagonal Calculator and its reference values.

What does the Rectangle Diagonal Calculator calculator do?

It helps with finding corner-to-corner measurements for rectangular panels and screens.

What formula does the Rectangle Diagonal Calculator calculator use?

Rectangle diagonal = √(length² + width²).

What inputs are valid?

Length and width should be zero or greater. Physical dimensions are typically positive.

When would I use this?

finding corner-to-corner measurements for rectangular panels and screens

Methodology and Review

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