Exterior Walls Quantity Takeoff Calculator

Prepared By: Parag Kamlakar Pal - Owner of www.civilnotess.com

Accurately estimating the quantity of materials required for exterior walls is a crucial step in construction planning. Below, you’ll find a comprehensive guide to calculating the exterior wall area with a numerical example, followed by an interactive calculator to help you with your project.

Step-by-Step Calculation Process

To determine the total exterior wall area, follow these steps:

1. Measure Wall Dimensions

Measure the length and height of each exterior wall.

2. Calculate Wall Area

For each wall, multiply the length by the height to get the wall area.

3. Subtract Openings (if any)

If the wall has windows or doors, subtract their areas from the total wall area.

4. Sum Up All Walls

Add up the net areas of all exterior walls to get the total exterior wall area.

Numerical Example

Consider a building with the following dimensions:

• Wall 1: Length = 10 meters, Height = 3 meters
• Wall 2: Length = 15 meters, Height = 3 meters
• Wall 3: Length = 10 meters, Height = 3 meters
• Wall 4: Length = 15 meters, Height = 3 meters

The building has:

• 2 windows on Wall 1, each 1.5 meters wide and 1.2 meters high.
• 1 door on Wall 2, 2 meters wide and 2.1 meters high.

Calculation:

Wall 1:
Wall Area = 10m × 3m = 30 square meters
Area of Windows = 2 × (1.5m × 1.2m) = 3.6 square meters
Net Wall Area = 30 - 3.6 = 26.4 square meters

Wall 2:
Wall Area = 15m × 3m = 45 square meters
Area of Door = 2m × 2.1m = 4.2 square meters
Net Wall Area = 45 - 4.2 = 40.8 square meters

Wall 3:
Wall Area = 10m × 3m = 30 square meters
Net Wall Area = 30 square meters (No openings)

Wall 4:
Wall Area = 15m × 3m = 45 square meters
Net Wall Area = 45 square meters (No openings)

Total Exterior Wall Area:
26.4 + 40.8 + 30 + 45 = 142.2 square meters

Exterior Walls Quantity Calculator

Wall Length (m): Wall Height (m):

Openings (Windows/Doors)

Width of Opening (m): Height of Opening (m):

Total Exterior Wall Area: 0 square meters