Drywall Screw Spacing Chart: Screws Per Sheet 2026

A wall sheet takes 32 screws — a ceiling sheet takes 37

Drywall screws hold the sheet to the studs, and the spacing is set by the building code and the manufacturers: on a wall the screws go 8 inches apart along the edges and 16 inches apart in the field; on a ceiling the edges are 7–8 inches and the field is 12 inches, because gravity pulls the sheet down and the ceiling needs more holding power. The counting rule is: “A sheet crosses one stud per spacing interval plus one at the end. Middle studs get one screw per field-spacing interval along the 4-ft height plus one at the top; edge studs get one screw per edge-spacing interval along the height.” So per-sheet screws = (studs − 2) × (48 / field + 1) + 2 × (48 / edge), with studs = floor(length / spacing) + 1 — a 10-ft sheet at 16 in o.c. crosses 8 studs, because the last bay is only 8 in wide. Sheets hang horizontally, so the 4-ft dimension is the height and the 8/10/12-ft dimension runs along the studs. On the defaults — 10 sheets, size 4×8, application wall, wood studs 16 in o.c., waste 5% — the screws per sheet are 32, the total is 320, with waste 336, and you buy 4 boxes of 100 — or 1 box of 1,000.

At the defaults — sheets 10, size 4×8, application wall, wood studs 16 in o.c., waste 5% — the screws per sheet are 32, the total screws are 320, with waste 336, the boxes of 100 are 4 and the boxes of 1,000 are 1. Check the identities: studs = floor(length / spacing) + 1; per-sheet screws = (studs − 2) × (48 / field + 1) + 2 × (48 / edge); total = per-sheet screws × sheets; with waste = round(total × (1 + waste %)) to whole screws; boxes of 100 = waste total / 100, rounded up; boxes of 1,000 = waste total / 1,000, rounded up. Ceiling counts use 8 in edges (the 7–8 in range). Rounding convention: totals are computed from unrounded values, so rounded parts may differ by a cent from their rounded sum.

The worked example, line by line

Setup: sheets 10, size 4×8, application wall, wood studs 16 in o.c., waste 5%.

Line 1 — the studs. A 4×8 sheet hung horizontally is 96 in long; at 16 in o.c. it crosses floor(96 / 16) + 1 = 7 studs.

Line 2 — the middle studs. 7 − 2 = 5 middle studs; each gets 48 / 16 + 1 = 4 screws: 5 × 4 = 20 screws.

Line 3 — the edge studs. 2 edge studs; each gets 48 / 8 = 6 screws: 2 × 6 = 12 screws.

Line 4 — the per-sheet total. 20 + 12 = 32 screws per sheet.

Line 5 — the job total. 32 × 10 = 320 screws; with 5% waste, 320 × 1.05 = 336 screws.

Line 6 — the boxes. 336 / 100 = 3.36, rounded up to 4 boxes of 100; 336 / 1,000 = 0.336, rounded up to 1 box of 1,000.

Reverse: the screws with waste are 336; that is 10.5 sheets, so buy 11 sheets — at 1 screw less it is 10.4688 sheets, still 11. Four boxes of 100 hold 400 screws and cover 12 sheets; 13 sheets need 416 screws, more than 400. One box of 1,000 holds 1,000 screws and covers 31 sheets; 32 sheets need 1,024 screws, more than 1,000.

Every branch, checked

Ceiling, wood joists 16 in o.c.: per sheet 37, total 370, with waste 389 — 4 boxes of 100. A ceiling on wood joists at 16 inches takes 37 screws a sheet — 5 more than a wall — because the field spacing is 12 inches instead of 16. Ten sheets need 370 screws, 389 with waste, and 4 boxes of 100.

Wall, wood studs 24 in o.c.: per sheet 24, total 240, with waste 252 — 3 boxes of 100. A wall on wood studs at 24 inches takes 24 screws a sheet — 8 fewer than at 16 inches — because the sheet crosses 5 studs instead of 7. Ten sheets need 240 screws, 252 with waste, and 3 boxes of 100.

Ceiling, wood joists 24 in o.c.: per sheet 27, total 270, with waste 284 — 3 boxes of 100. A ceiling on wood joists at 24 inches takes 27 screws a sheet. Ten sheets need 270 screws, 284 with waste, and 3 boxes of 100.

Wall, metal studs 16 in o.c.: per sheet 37, total 370, with waste 389 — 4 boxes of 100. A wall on metal studs at 16 inches takes 37 screws a sheet — 5 more than wood studs — because the field spacing is 12 inches on metal. Ten sheets need 370 screws, 389 with waste, and 4 boxes of 100.

Ceiling, metal joists 16 in o.c.: per sheet 37, total 370, with waste 389 — 4 boxes of 100. A ceiling on metal joists at 16 inches takes 37 screws a sheet, the same as wood joists — the ceiling field spacing is 12 inches either way. Ten sheets need 370 screws, 389 with waste, and 4 boxes of 100.

Sheet size 4x10: per sheet 36, total 360, with waste 378 — 4 boxes of 100. A 4x10 sheet on a wall at 16 inches takes 36 screws — 4 more than a 4x8 — because it crosses 8 studs instead of 7. Ten sheets need 360 screws, 378 with waste, and 4 boxes of 100.

Sheet size 4x12: per sheet 44, total 440, with waste 462 — 5 boxes of 100. A 4x12 sheet on a wall at 16 inches takes 44 screws — 12 more than a 4x8 — because it crosses 10 studs instead of 7. Ten sheets need 440 screws, 462 with waste, and 5 boxes of 100.

1 sheet: per sheet 32, total 32, with waste 34 — 1 boxes of 100. One sheet needs 32 screws, 34 with waste, and 1 box of 100 — a single box covers it with room to spare.

5 sheets: per sheet 32, total 160, with waste 168 — 2 boxes of 100. Five sheets need 160 screws, 168 with waste, and 2 boxes of 100.

20 sheets: per sheet 32, total 640, with waste 672 — 7 boxes of 100. Twenty sheets need 640 screws, 672 with waste, 7 boxes of 100 — or 1 box of 1,000, which covers 31 sheets.

50 sheets: per sheet 32, total 1,600, with waste 1,680 — 17 boxes of 100. Fifty sheets need 1,600 screws, 1,680 with waste, 17 boxes of 100 — or 2 boxes of 1,000.

Waste 0%: per sheet 32, total 320, with waste 320 — 4 boxes of 100. With no waste allowance, 10 sheets need 320 screws and 4 boxes of 100 — the waste allowance only adds 16 screws here, not a whole box.

Waste 10%: per sheet 32, total 320, with waste 352 — 4 boxes of 100. With a 10% waste allowance, 10 sheets need 352 screws and 4 boxes of 100 — the extra 32 screws still fit in the same 4 boxes.

What the defaults assume

The model assumes the sheets hang horizontally, so the 4-ft dimension is the height and the 8/10/12-ft dimension runs along the studs — a sheet hung vertically would cross fewer studs and take fewer screws. It assumes the standard spacing: wall edges 8 in, wall field 16 in, ceiling edges 7–8 in, ceiling field 12 in; the ceiling counts use 8 in edges. It assumes a 5% waste allowance for drops, bad drives and stripped heads, rounded to whole screws. It assumes the screws are the usual 1-1/4 in coarse-thread drywall screws for wood studs, or fine-thread for metal studs — the count is the same either way, only the field spacing changes. With 0 sheets the answer is 0 screws, 0 boxes. With 1 sheet the answer is 32 screws, 34 with waste, 1 box of 100. Rounding convention: totals are computed from unrounded values, so rounded parts may differ by a cent from their rounded sum; the reverses are nearest-value solutions, and the exact unrounded figures (10.5, 10.4688) are stated wherever the rounded figures appear.

Output · formula · meaning

Who uses this

• The homeowner drywalling a garage with 10 sheets: they learn they need 336 screws with waste — 4 boxes of 100 — and they check the 4x12 branch (462 screws, 5 boxes) before deciding whether the longer sheets are worth it.
• The contractor pricing a ceiling job: they learn a ceiling sheet takes 37 screws instead of 32, so 50 ceiling sheets need 1,850 screws before waste — and they check the 24-inch branch (27 a sheet) to see what wider joist spacing saves.
• The DIYer with one box of 1,000 screws: they learn one box covers 31 sheets on a wall at 16 inches — and they check the 4x10 branch (36 a sheet) to see how far the same box goes on longer sheets.
• The renovator switching to metal studs: they learn a wall on metal studs takes 37 screws a sheet, not 32, because the field spacing is 12 inches — and they check the ceiling branch (also 37) to see the ceiling count is unchanged.

Accuracy & limitations

The chart is the standard spacing from the building code and the manufacturers (USG): wall edges 8 in, wall field 16 in, ceiling edges 7–8 in, ceiling field 12 in. The counts are exact arithmetic from the counting rule: studs = floor(length / spacing) + 1; per-sheet screws = (studs − 2) × (48 / field + 1) + 2 × (48 / edge); total = per-sheet screws × sheets; with waste = round(total × (1 + waste %)) to whole screws; boxes of 100 = waste total / 100, rounded up; boxes of 1,000 = waste total / 1,000, rounded up. The 4-decimal exact is shown where the rounding matters: 336 screws is 10.5 sheets (shown as 10.5); at 335 screws it is 10.4688 sheets. What the model cannot do is count the screws for blocking, corners, or sheets cut to fit — cut sheets cross fewer studs and take fewer screws, and corners and openings need extra fasteners the chart does not count. For the sheets themselves, see the drywall calculator; for the fan in the same ceiling, see the ceiling fan size chart; for the filter in the same system, see the air filter size chart. This is a calculator, not a building code.