Drywall Calculator

Formula

sheets = ⌈(area × (1 + waste/100)) / sheetArea⌉screws = sheets × 32jointCompound = ⌈area × 0.01⌉  (gallons)

Parameters

Sheet Size

4×8 (32 sq ft), 4×10 (40 sq ft), or 4×12 (48 sq ft).

Waste %

Extra for cuts around windows, doors, corners.

Results

Sheets

Drywall panels to purchase.

Screws

Drywall screws (32 per sheet for 16" OC framing).

Joint Compound

Gallons for taping and finishing.

Example

sheets = ⌈(800 × 1.10) / 32⌉ = 28 sheetsscrews = 28 × 32 = 896 screwsjointCompound = ⌈800 × 0.01⌉ = 8 gal

Common Use Cases

• New construction walls and ceilings
• Basement finishing
• Room additions and remodels
• Garage conversions

Notes

• Use 4×12 sheets to reduce joints on large ceilings.
• Screw count assumes 16" OC framing. Reduce ~25% for 24" OC.