Construction & Painting
Wall Area Calculator
Calculate total wall area, paint required, and cost for walls.
📐 Wall Dimensions
Wall Length
m
Wall Height
m
Number of Walls
Total walls to be covered
🚪 Subtract Openings
Door Area
m²
Total area of doors (approx 2m² each)
Window Area
m²
Total area of windows (approx 1.5m² each)
🎨 Paint & Cost
Paint Coverage
m²/L
Square meters covered per liter of paint
Paint Cost per Liter
$
Number of Coats
Number of coats needed
Area
0%
Total Wall Area
0 m²
net paintable area
Gross Wall Area
0 m²
Openings Deduction
0 m²
Paint Required
0 L
Total Cost
$0
📊 Wall Area Breakdown
| Component | Area | Unit |
|---|
How the formula works
Gross Area = Length × Height × Number of Walls | Net Area = Gross Area − (Doors + Windows)
- Gross Wall Area = Wall Length × Wall Height × Number of Walls
- Openings Deduction = Door Area + Window Area
- Net Wall Area = Gross Wall Area − Openings Deduction
- Paint Required = Net Wall Area × Coats ÷ Paint Coverage
- Total Cost = Paint Required × Paint Cost per Liter
- Paint Coverage = Square meters covered per liter (typical: 8-12 m²/L)