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Drywall Calculator
Estimate drywall sheets from surface area, layer count, sheet dimensions, and offcut allowance.
- Sheets
- 11
- Area including waste
- 33 m²
How the calculation works
Sheets = area × layers × (1 + waste/100)/(sheet length × sheet width), rounded up.
Inputs
- Surface area, m²
- Sheet length, m
- Sheet width, m
- Layers
- Waste, %
Calculation details
Covering 30 m² in one layer with 1.2 × 2.5 m sheets needs 10 sheets before waste. Include both sides of a partition in the total surface area.
Sheet layout, framing spacing, fasteners, and structural loading are not calculated. Choose waste based on openings and reuse of offcuts.
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Updated: 2026-10-02