How many studs a wall needs — spacing sets the count (length ÷ spacing + 1)
A wall’s base stud count is length ÷ spacing + 1 — the “+1” is the stud that closes the far end. At 16″ on-center a 12-ft wall takes 10 studs. The calculator then adds studs for each corner, T-intersection, and opening.
What this diagram shows
An elevation of a stud wall — a single bottom plate, a double top plate, and vertical studs repeated at a fixed on-center spacing. The base stud count is the wall length divided by the spacing, plus one stud to close the far end. The drawn wall is 12 feet long with studs 16 inches on center, so it holds 10 studs: 144 inches divided by 16 is 9 bays, plus 1 equals 10. This is the base count only — a real takeoff adds studs for every corner, T-intersection, and opening (king, jack, and cripple studs).
Stud Wall Framing Calculator
Size studs, plates, headers, cripples & nails for 2x4 / 2x6 walls. Per 2021 IRC R602.3, R602.7 header spans & R602.3(1) nailing. Free, no signup.
