`D = sqrt(l^2 + h^2 + d^2)`

Enter a value for all fields

The Diagonal of a Box calculator computes Box aka Parallelepiped the diagonal (D) of a box (a.k.a. rectangular parallelepiped) based on the length, height and depth (see diagram).

INSTRUCTIONS: Choose your preferred units and enter the following:

• (l) This is the length of the box.
• (h) This is the height of the box.
• (d) This is the depth of the box.

Diagonal:  The diagonal (D) is returned in meters.  However, this can be automatically converted into many other length units (e.g. feet, centimeters) via the pull-down menu. 

The Math / Science

The formula for the diagonal of a box is:

  ` D = sqrt(l² + h² + d²)`

where:

• D is the length of the box diagonal
• l is the length of the box
• h is the height of the box
• d is the depth of the box

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