Estimate drywall sheets, joint compound, tape, and screws needed for your project.
Sheet Orientation: Hang sheets horizontally ("vertical" orientation) for fewer joints on tall walls. Use 12-ft sheets for 9-ft ceilings to minimize joints.
Waste Allowance: Order 10-15% extra sheets for cuts, mistakes, and future repairs. Small bathrooms may need more due to many cut pieces.
Joint Compound: One 4.5-gallon bucket covers ~400-500 sq ft of drywall. Buy "all-purpose" for taping, then "topping" for finish coats.
Screws vs Nails: Use 1-1/4" drywall screws (not nails) for stronger hold. Space screws 8" apart on walls, 6" on ceilings. One 25-lb box covers ~1,000 sq ft.
A 12×12 room with 8-ft ceilings has ~384 sq ft of wall area (minus door/windows ≈ 330 sq ft). Using 4×8 sheets (32 sq ft): 330 ÷ 32 = 10.3 → 11 sheets + 10% waste = 12-13 sheets.
Use 4×8 sheets for standard 8-ft ceilings (easier to lift). Use 4×12 sheets for 9-ft+ ceilings (fewer joints). Avoid 4×16 sheets unless you have a helper — they're very heavy.
One 4.5-gallon bucket covers ~400-500 sq ft of drywall (about 12-16 sheets). You'll need 2-3 buckets for an average room: 1 for taping, 1-2 for finish coats.
Always use screws (1-1/4″ for 1/2″ drywall). Nails pop over time. Screws provide stronger hold. Space screws 8″ apart on walls, 6″ on ceilings. Use 1-1/4″ for metal studs.
Ceiling area = room length × width. A 12×12 room = 144 sq ft. Using 4×12 sheets: 144 ÷ 48 = 3 sheets (no waste for rectangular rooms). Always order 10% extra for cuts and mistakes.