What size drywall should I buy?

4×12 sheets reduce seams on long walls; 4×8 sheets are easier to handle solo.

How much drywall waste should I plan?

Add 10–15% for cutouts around windows, doors, and outlets.

Enter your wall and ceiling area to estimate the number of 4×8 or 4×12 drywall sheets needed, with a waste factor.

Estimates only. Round up and buy a little extra to account for waste, spills, and breakage.

Sheets = total area ÷ sheet area, × (1 + waste%). 4×8 = 32 sq ft, 4×12 = 48 sq ft.

What size drywall should I buy?: 4×12 sheets reduce seams on long walls; 4×8 sheets are easier to handle solo.
How much drywall waste should I plan?: Add 10–15% for cutouts around windows, doors, and outlets.

Estimate gallons of paint by wall area, coats, and openings.

Estimate insulation batts or rolls by area.

Calculate the area of a room or surface in square feet, yards, and meters.

Estimate drywall sheets for walls and ceilings, with 4×8 and 4×12 sheet coverage.