Wall Area Calculator
Calculate total paintable wall area from room dimensions and wall height.
How It Works
Enter your room length, width, and wall height. The calculator computes the total wall area and subtracts window and door areas.
Formula
Wall Area = 2 × (Length + Width) × Height − Windows − Doors
Frequently Asked Questions
How do I calculate wall area?
Add the length and width, multiply by 2 (for all 4 walls), then multiply by the wall height. Subtract window and door areas.
What area does a standard window take?
A standard window is about 15 sq ft and a standard door is about 20 sq ft.