Question: how many square feet in a drywall sheet?
Answer: For example: you have a 10' x 10' room with 8 foot high ceilings. Each wall would be 80 square feet so four walls equals 320 square feet (sf) of drywall needed. The ceiling is 10' x 10' or an additional 100 square feet. Sheets of drywall are either 4 x 8's (32 sf each) or 4 x 12's (48 sf each).