One wall or a whole garage — get the stud count, the plate footage, and what to actually load at the lumber yard.
Wall details
ft
Studs to buy (incl. 10% waste)
—
Layout studs (calculated)—
Plate lumber (3 runs: 1 bottom + double top)—
Plate boards @ 16 ft—
Added for corners & openings—
Each corner adds 1–2 studs for backing, and every opening needs a king stud, jack stud and cripples on each side (this uses +4 per opening as a working average). Headers are extra — size them to the span.
How framers count a wall
Layout studs land every 16 (or 24) inches, plus one to start the wall. Then the real world adds more: corners need backing for drywall, and every door or window eats studs — a king, a jack, and cripples per side. Plates run three times the wall length: one bottom, two on top.
A 40-ft wall at 16 OC with 4 corners and 2 openings: 31 layout studs + 8 for corners + 8 for openings = 47, call it 52 with waste. Plates need 120 linear ft — eight 16-footers. The rough rule of "one stud per foot of wall" exists because corners, openings and waste reliably eat the gap between 31 and 40.
16 vs 24 on center
16 OC is the default for load-bearing walls and anything getting 1/2-in drywall or siding. 24 OC saves about a third of the studs and is fine for many non-bearing partitions and with advanced-framing designs — but check what your sheathing, siding, and local code want before you save those eight studs.
Frequently asked questions
How many studs do I need per foot of wall?
The classic estimator’s rule is one stud per linear foot for 16-inch spacing. The pure layout math gives fewer, but corners, openings and waste consistently make up the difference on real walls.
Why does a wall have three plates?
One bottom plate anchors the wall to the floor; two top plates stack to tie intersecting walls together and carry loads between studs. Single top plates are allowed in some engineered/advanced framing situations.
What extra framing does a window or door need?
Each side gets a full-height king stud and a shorter jack (trimmer) stud carrying the header, plus cripple studs above the header and below a window sill. Wide openings may need doubled jacks and engineered headers.