Drywall Sheets for a 16×20 Room

A 16×20 room with 8 ft walls and a ceiling is about 896 sq ft — roughly 32 sheets of 4×8 drywall plus 2 bucket of mud. Adjust below; choose Walls only to exclude the ceiling.

Drywall sheets

32 sheets

Surface area

896 sq ftwalls + ceiling

4×8 sheets

32 sheetsincludes 12% waste for cuts

Mud & tape

2 buckets, 1 roll+ 2 box screws

Sheet cost (est.)

$592$18.50/sheet sample price; check thickness requirements

How this estimate works

Wall area = 2 × (length + width) × height. Add length × width when including the ceiling. Multiply by your waste allowance, then divide by the selected sheet area and round up. Defaults are 12% waste and 4 × 8 ft sheets.

Doors and windows are not deducted. Openings can leave reusable offcuts or create extra cuts. Mud, tape, and screws use rough area-based allowances; sheet thickness, framing spacing, fire-rated assemblies, and product instructions must be checked for your room.

Planning estimate. Adjust allowances and sample prices for your supplier; tax, delivery, and labor are not included.

BEYOND THE MATERIALS

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Drywall Sheets for a 16×20 Room

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