Drywall Sheet Calculator

Sheets needed = wall area / sheet area (32 ft² for 4×8, 48 ft² for 4×12).

Inputs

Result

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General calculation reads

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How to use this calculator

  • Enter total wall+ceiling area to drywall.
  • Pick sheet size.
  • Read sheet count (with 10% waste).

About this calculator

Standard drywall sizes: 4×8 ft (32 ft²) is the most common — fits stairwells, easier to handle. 4×12 ft (48 ft²) for large continuous walls — fewer seams. Half-inch thickness is standard for walls; 5/8" for ceilings and fire-rated areas.

Frequently asked

4×8 vs 4×12?+
4×8 easier for one person; 4×12 means fewer seams (less mudding). Pros use 12-footers; DIYers usually 8-footers.
Half-inch or 5/8"?+
½" for walls. 5/8" for ceilings (sag resistance) and fire-rated assemblies (Type X).
How many fasteners?+
~32 screws per 4×8 sheet (rule: 8 inches O.C. on edges, 12" in field).
Mud and tape?+
About 1 box of all-purpose mud per 200-300 ft²; 1 roll of tape per 500 ft.
Green vs purple board?+
Greenboard: moisture-resistant for bathrooms. Purpleboard: better mold/mildew resistance, full ratings.

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