calcs.homes
calcs.homes
Enter your wall length and stud spacing to get a wall framing stud count, including extra studs for corners and openings.
Estimate only — assumes 2 studs per corner and 3 per opening (king, jack, and cripple).
Base stud count divides wall length (converted to inches or millimeters) by your spacing — 16 in / 400 mm on-center is the default — and rounds up, then adds one extra stud to close out the end of the run. Each corner adds 2 studs, and each door or window opening adds 3 for the king, jack (trimmer), and cripple studs, which get added on top of the base count for the total.
16 in on-center spacing is standard for load-bearing walls because it aligns with 4×8 ft sheathing panels (48 in divides evenly into three 16 in bays) and keeps stud spacing within typical building requirements for wall strength. Corners and openings need extra framing — corner studs give sheathing something to nail to on both faces, while king and jack studs carry the header's load — so they're added on top of the repeating field studs rather than folded into the base count.
16 in (400 mm) on-center is standard for most load-bearing walls. 24 in (600 mm) is sometimes used for non-load-bearing interior walls to save material — check your local code and framing plan.
Every door or window needs king studs (full height, either side) and jack studs (support the header), plus sometimes cripple studs above or below — that's typically 3 extra studs per opening beyond the base count.