Switching to 12-foot sheets cuts your drywall order by a third

A 1,000 sq ft room needs 35 sheets of 4x8 drywall, or 23 sheets of 4x12, at 10% waste.

Add waste first: 1,000 sq ft x 1.10 = 1,100 sq ft to actually cover.

4x8 sheets run 32 sq ft each. 1,100 / 32 = 34.375, rounded up to 35 sheets.

4x12 sheets run 48 sq ft each. 1,100 / 48 = 22.9, rounded up to 23 sheets.

Same room, 12 fewer sheets, and 12 fewer joints to tape and mud.

Screws follow the sheet count at about 32 per sheet on 16 in centers. 35 sheets calls for roughly 1,120 screws. 23 sheets calls for about 736.

10% waste is the number for a room with doors and windows cutting into sheets. A plain rectangle with no openings runs less.

The rounding rule always rounds up. 34.375 sheets means you buy 35, whether you use that last quarter-sheet or not. Plan your cuts to carry the leftover to the next wall instead of the dumpster.

Run your own room

Open the drywall calculator and get the sheet count and screw count for your actual wall, both sheet sizes, before you call the supplier.