Calculate net surface area for painting or plastering.
Deduct doors/windows, account for multiple coats, and estimate material quantities (Paint/Cement/Sand).
🎯 Project Type
Painting
Plastering
🚪 Openings to Deduct
Enter total area of doors, windows, etc.
No openings added yet.
* Side deduction accounts for mortar around openings not being plastered if specified.
Wastage includes dry volume factor (1.33) and spillage.
📊 Area & Material Summary
Enter parameters and click "Calculate Quantities" to see results.
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Disclaimer
Coverage rates vary significantly by brand, roller type, and surface porosity. This calculator uses average industry standards. For rough surfaces, textured finishes, or dark-to-light color changes, increase consumption by 20-30%. Always buy 5-10% extra for touch-ups.