How to Measure Square Footage - Enterprise Wood Products (2024)

Measuring Walls

Let’s start with walls, as they have the challenge of windows and doors to measure around. The easiest method is usually to measure the walls, ignoring the windows and doors for now, as you can subtract them out later. Measure the length and the height of each wall, and multiply the height times the width. This gives you the square footage. For example, a 8 feet high wall that is 10 feet long is 80 square feet. Do that for each wall, and determine the total.

Now measure each door and window for height and width. Multiply height times width to get the square footage of each, and total all the doors and windows. Subtract that total from the your initial square footage total for the walls and you have your net square footage for the project.