# Walls volume

This construction calculator calculates volume of four walls of a rectangular building by building length, width, height and thickness of a walls

The calculator below calculates the volume of construction materials, like concrete or bricks, which is needed for perimeter walls of a rectangular building. It uses length, width and height of a building, plus thickness of the walls.

Calculation is rather trivial.

First, you multiply outer dimensions of a building: length by width by height, which gives you outer volume of a building "box".

Second, you calculate inner space of a building, multiplying length minus two thickness by width minus two thickness by height.

The walls volume is the difference between outer volume of a building and inner space of a building. If you need to take into account doorways and window openings you can use Total volume calculator

**Note that you should use the same units of length in all form fields below, whether meters, feet or inches. Do not mix meters and centimeters or feet and inches.**

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