Drywall & Plywood Calculator
Sheets needed from area, board size, layers and waste
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⚠️ This calculator is a simple reference tool based on standard engineering formulas. Actual required quantities may differ due to site conditions, material types, construction tolerances, specifications, and changes in applicable regulations. calcstool.com assumes no legal liability for any procurement, design, construction, or other decisions made in reliance on these results, nor for any direct or indirect damages arising therefrom.
FAQ
How are drywall sheets calculated?
Divide the surface area by the area of one board, then multiply by layers and waste and round up. Example: 30 ㎡ with 900×1800 (1.62 ㎡) boards, single layer, 10% waste ≈ 21 sheets.
What waste factor should I use?
Typically 5–10% for cutting loss and spares. For complex surfaces or many openings, use 10–15%.
What are common board sizes?
Common gypsum boards are 900×1800 mm (1.62 ㎡), 900×2400 mm (2.16 ㎡) and 1200×2400 mm (2.88 ㎡); standard plywood is 1220×2440 mm (4×8 ft, 2.98 ㎡).
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