Geometry

Surface

Surface area of a rectangular box.

Free to use — no sign-up or login.

Rectangular prism surface figure An unfolded rectangular prism net showing six faces and the length, width, and height dimensions.

Enter valid values to draw the figure.

l = length · w = width · h = height · S = surface area

The unfolded net shows the six faces whose areas form the prism's total surface.

Surface area

This free Surface covers Surface area of a rectangular box.

Enter the Surface fields, then read the output. Geometry calculators on this site keep the formula visible beside the form, with no account required.

Using the Surface

Surface area of a rectangular box. Typical inputs are Length (l), Width (w) and Height (h). How it works beside the form states the identity the Surface applies.

FAQ

How do I use the Surface?

Open the Surface, fill Length (l), Width (w) and Height (h), and read the result. Sum the three unique face areas and double.

What formula does the Surface use?

The Surface uses the identity in How it works. In words: Sum the three unique face areas and double.

Sources