How many drywall sheets do I need?

Divide the area to cover by the sheet size (32 sq ft for 4×8, 48 for 4×12) and add about 10% for waste and cuts.

How much joint compound do I need?

Plan for roughly one box of compound per 400 square feet of drywall for taping and three coats.

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How many drywall sheets do I need?: Divide the area to cover by the sheet size (32 sq ft for 4×8, 48 for 4×12) and add about 10% for waste and cuts.
How much joint compound do I need?: Plan for roughly one box of compound per 400 square feet of drywall for taping and three coats.