1 Your measurements

Type feet and inches the way you'd write them, like 12' 6" or 30 3/8. Decimals work too.

ft
ft
ft
%

2 What to buy

Drywall sheets
18
4' × 8' sheets, incl. 10% waste
Joint compound
2 buckets
4.5 gal all-purpose (≈79 lb)
Area to cover
511 sq ft
walls + ceiling
Wall area384 sq ft
Ceiling area144 sq ft
Openings deducted (half their area)18 sq ft
Board purchased576 sq ft
Paper tape213 ft → 1 × 250 ft roll
Drywall screws≈ 576 (2 lb of 1-1/4" coarse thread)

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