How many studs in a 10 foot wall?
A plain 10-foot wall at 16" on centre takes 9 field studs, plus 3 more for one corner. The layout rule, the plate footage, and counts for every wall length.
A 10' wall at 16" on centre takes 9 field studs — 12 in total with one three-stud corner.
Plus 10 ft of bottom plate and 20 ft of top plate, because the top plate is doubled.
How that is worked out
- A stud at 0 and one at every 16" after it: 120" ÷ 16" = 7.5, and a stud at the far end, so 9 marks across the wall.
- "16 inches on centre" means the centres are 16" apart, which is why a framer pulls 15 1/4" for the first layout mark rather than 16". The stud at the end of the wall sits flush with the end of the plate, so its centre is only three quarters of an inch in; marking 15 1/4" and drawing the next stud on the far side of the line puts that stud's centre on 16", and every sheet edge after it on the middle of a stud. Mark both plates together and they cannot disagree.
- Corners and openings are extra. A three-stud corner adds 3; every door and window adds king studs, jacks and cripples on top of the field count.
Plain wall, no openings, one three-stud corner
| Wall length | Studs at 16" OC | Studs at 24" OC | Bottom plate | Top plate (doubled) |
|---|---|---|---|---|
| 8' | 10 | 8 | 8 ft | 16 ft |
| 10' | 12 | 9 | 10 ft | 20 ft |
| 12' | 13 | 10 | 12 ft | 24 ft |
| 16' | 16 | 12 | 16 ft | 32 ft |
| 20' | 19 | 14 | 20 ft | 40 ft |
| 24' | 22 | 16 | 24 ft | 48 ft |
Worth knowing
- 24" centres uses noticeably fewer studs — 9 against 12 on this wall — but it is not a free choice. It needs thicker sheathing or drywall to span between studs without waving, and whether it is allowed at all depends on what the wall carries and what your code says.
- This counts a plain wall. Openings change it: each one adds two king studs, a jack under each end of the header, and cripples above (and below, for a window), while removing whatever field studs fell inside the opening.
- The site will count the studs a header needs but will not size the header itself. How many jacks a span wants depends on species, grade, snow load and what bears on the wall, and a wrong number there is a structural mistake rather than a cosmetic one — get it from the span tables or an engineer.
- Add a stud or two to the order. A crowned or twisted stick gets culled, and it is always the last one.
Work out your own numbers
- Stud calculator
Field studs at 16" or 24" on centre, corner studs, and the king and jack studs every opening adds.
Related questions
- How do you calculate the number of studs in a wall?
- Divide the wall length by the spacing, add one for the stud at the far end, then add the corner and opening studs. For a 10-foot wall at 16" centres that is 120 ÷ 16 = 7.5, so 9 marks across the wall, plus 3 for a corner. Most people then add 10% for culls and mistakes.
- Is 16 or 24 inch stud spacing better?
- 16" is the default and 24" is the efficiency play. 24" centres uses about a third fewer studs and leaves more room for insulation, but it needs 5/8" drywall on the ceiling and thicker sheathing to avoid visible waves, and what it is allowed to carry is a code question. For a load-bearing wall, that question gets answered before the material saving matters.
- How many studs do I need for a 12x12 room?
- About 52 for four 12-foot walls at 16" centres with no openings — 13 per wall, counting ten field studs and one three-stud corner each, so each of the room's four corners is counted once. Then subtract the field studs that fall inside each door and window and add their king studs, jacks and cripples back. Work it wall by wall rather than by perimeter; the openings are where the count actually moves.