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Rectangle Diagonal Angle

Result

Calculated result 0.6435011088 Based on the values entered.
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Rectangle Diagonal Angle — free online calculator.

Formula

Diagonal = √(L² + W²); Angle = arctan(W / L)
  • Rectangle Diagonal Angle calculates its result from Length, Width. It uses the formula Diagonal = √(L² + W²); Angle = arctan(W / L). Change any input to recalculate the result instantly.
  • The main inputs are Length, Width. Enter them in the units and format shown in the calculator.
  • Keep comparable quantities in compatible units whenever the formula combines or compares them.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Rectangle Diagonal Angle

Inputs
  • Length: 8
  • Width: 6

Using Length = 2, Width = 3, the calculated result is 0.9827937232.

Sample result: Calculating…

Frequently asked questions

What does the Rectangle Diagonal Angle calculate?

Rectangle Diagonal Angle — free online calculator.

Which values should I enter?

Enter Length, Width using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Diagonal = √(L² + W²); Angle = arctan(W / L).

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 10, 2026