Wall Square Footage Calculator

Calculate net wall area minus windows and doors.

Wall & Openings

Wall Width (ft)

Wall Height (ft)

Windows (#)

Doors (#)

Custom Deduction (sq ft)

Area

Enter dimensions to find square footage.

About this calculator

Overview

To accurately estimate paint, wallpaper, or drywall, you need the Net Wall Area—the total wall space minus any openings like windows and doors.

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Pro Tips

If you have trim, measure inside frames for painting area, or include frames for total wall covering.
Add 10% waste for most materials.

Fun Facts

Formula: Net Area = (Width × Height) - Openings