Wall size calculator

Answers the question: How many square meters are my walls?

This wall size calculator helps you calculate the number of square meters of walls in a room. For increased accuracy, this wall size calculator takes into account the area of doors and windows in the room.


Total wall area: 47.04 square meters

The wall area calculated is an approximate number as the doors and window sizes are set to a standard size. See below for the calculations for their sizes.

Our calculations

At Calculatorian, we are keen to share our knowledge, be transparent and open to feedback. Here are the calculations used to create this calculator. If you find an error or deficiency, contact us and we'll fix it in an instant!

Total wall area was calculated like this:

Step 1

First we need to calculate the variable da. da = door area in square meters.

Step 2

Then we need to calculate the variable wa. wa = window area in square meters.

Step 3

Finally we put it together and calculate it like this:

Variables used in this formula

l = Room length in meters
w = Room width in meters
h = Wall height in meters
d = Number of doors
wg = Number of windows