Wall Square Footage Calculator
Calculate wall area for painting, wallpaper, or any wall covering project
Calculate Wall Square Footage
Choose your room's shape to determine how to input wall measurements
Wall Dimensions
Length of one wall touching the corner
Length of the adjacent wall
Height from floor to ceiling (exclude molding)
Doors and Windows
Standard door: 3 × 7 ft (21 ft²)
Standard window: 3 × 4 ft (12 ft²)
Wall Square Footage Results
Formula: Wall square footage = Total wall length × Ceiling height
Calculation: 0.0 ft × 0.0 ft = 0.0 ft²
Net area: 0.0 - 0.0 - 0.0 = 0.0 ft²
Area Analysis
Example Calculation
Living Room Wall Area
Room: Rectangular living room
Dimensions: 12 ft × 15 ft
Ceiling height: 9 ft
Openings: 2 doors + 3 windows
Step-by-Step Calculation
1. Perimeter: 2 × (12 + 15) = 54 ft
2. Wall area: 54 × 9 = 486 ft²
3. Door area: 2 × 21 = 42 ft²
4. Window area: 3 × 12 = 36 ft²
5. Net area: 486 - 42 - 36 = 408 ft²
Room Shape Guide
Rectangle
Two different wall lengths
Perimeter = 2 × (L₁ + L₂)
Square
All walls equal length
Perimeter = 4 × L
Other
Irregular or complex shapes
Measure total perimeter
Standard Opening Sizes
Doors
Windows
Measurement Tips
Use a steel tape measure for accuracy
Measure from floor to ceiling (exclude molding)
Include door and window openings in wall length
Draw a room plan to organize measurements
Account for dropped ceilings if present
Understanding Wall Square Footage Calculations
What is Wall Square Footage?
Wall square footage is the total surface area of your walls that will be covered by paint, wallpaper, or other wall coverings. It's calculated by multiplying the perimeter of your room by the ceiling height, then subtracting the area of doors and windows.
Why Calculate Wall Area?
- •Estimate paint or wallpaper needed
- •Calculate material costs accurately
- •Plan renovation budgets
- •Estimate labor time and costs
Calculation Formula
Wall Area = Perimeter × Height
Net Area = Wall Area - Door Area - Window Area
Standard: Door = 21 ft², Window = 12 ft²
Common Applications
- •Interior painting projects
- •Wallpaper installation
- •Wall paneling or wainscoting
- •Tile or stone accent walls
Real-World Applications
🎨 Painting Projects
- •Calculate gallons of paint needed
- •Estimate primer requirements
- •Plan for multiple coats
- •Budget for supplies and labor
🌺 Wallpaper Installation
- •Determine rolls of wallpaper needed
- •Account for pattern matching
- •Calculate adhesive requirements
- •Estimate installation time
🏗️ Wall Covering Materials
- •Vinyl or wood paneling
- •Tile or stone veneer
- •Fabric or textile wall covering
- •Decorative molding or trim