Drywall calculator for sheet counts

Wall length

Unit Feet (ft) Inches (in) Meters (m)

Waste (%)

Wall height

Unit Feet (ft) Inches (in) Meters (m)

Sheet length

Unit Feet (ft) Inches (in) Meters (m)

Sheet width

Unit Feet (ft) Inches (in) Meters (m)

Openings

Area unit Square feet Square meters

Calculate Copy result

— Enter dimensions and calculate.

• 20 × 8 ft wall, 20 sqft openings, 4 × 8 sheet, 10% waste → net 140 · nominal 5 · purchase 5
• 160 sqft no openings, 4 × 8, 10% waste → purchase 6
• Purchase = ceil((net ÷ sheet area) × (1 + waste%))

Area estimate only. Does not calculate stud layout, joints, fire rating, or code compliance.

Method: gross = L×H; net = gross − openings; ratio = net÷sheetArea; nominal = ceil(ratio); purchase = ceil(ratio×(1+waste%)). Example: 20×8 wall, 20 sqft openings, 4×8 sheet, 10% waste → net 140 · nominal 5 · purchase 5. Area estimate only — not stud layout or fire rating.