Calculate wall areas for painting, wallpaper, or tiling projects
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Typically 8-12 m² per liter
Measure twice, calculate once. Account for all openings and irregular shapes.
Add 10-15% extra paint for touch-ups and wastage during application.
Proper surface preparation can affect paint coverage by up to 20%.
Our free Wall Area Calculator helps homeowners, contractors, and DIY enthusiasts accurately calculate wall surface areas for painting, wallpapering, tiling, and other wall treatment projects. Whether you're planning a home renovation, estimating material costs, or preparing for professional painting, this tool provides precise measurements to ensure you purchase the right amount of materials.
Calculate total wall surface area, account for windows and doors, estimate paint or wallpaper requirements, and optimize your project budget with our comprehensive wall measurement calculator.
Calculate areas for multiple walls in a room, including different dimensions for each wall, to get accurate total surface area calculations.
Automatically subtract areas for windows, doors, built-in cabinets, and other openings to calculate net paintable/coverable wall area.
Convert wall area to paint gallons, wallpaper rolls, or tile boxes based on coverage rates and account for multiple coats or waste factors.
Include appropriate waste percentages for cutting, pattern matching, and imperfections to ensure you have sufficient materials.
Used by painters, contractors, interior designers, and DIY homeowners worldwide. No registration required - start calculating your wall areas instantly!
Typically, one gallon of paint covers 350-400 square feet with one coat. For a standard 12x12 room with 8-foot ceilings, you'll need approximately 1-2 gallons for walls. Our calculator factors in your specific dimensions, number of coats, and paint coverage rates for precise estimates.
No, walls and ceilings are calculated separately as they often require different materials, preparation, and application techniques. Ceilings typically have different surface textures and may need specialized paint or application methods compared to walls.
For irregular walls, break them into rectangular sections and calculate each separately. For angled ceilings, measure the wall height at both ends and use the average. Our calculator can handle multiple wall sections with different dimensions for complex room layouts.
Add 10% waste for painting (cutting in, roller overlap), 15-20% for wallpaper (pattern matching, trimming), and 10-15% for tiling (cuts, breakage). For complex patterns or beginner DIYers, increase waste factors to 15-25% to ensure you have enough materials.