Spacing is on-center
A 16 in O.C. wall is not a 24 in O.C. wall. Measure the run, then divide by spacing and add the end stud. Corners and T-intersections still need extra studs — keep them visible rather than hiding a round-up inside length.
A door is not always a one-stud save. Kings and jacks still exist. If you do not have a schedule, keep opening extras as an allowance.
Plates and headers are not studs
Double plates, sills and headers belong on companion lines. Board-foot totals for a lumber package use the board-foot tool. This page is a count.
Do it in order
- Enter wall run and the on-center spacing you will actually frame.
- Treat openings as kings, jacks and cripples rather than a simple subtraction.
- Keep plates, headers and sheathing as separate lines.
Worked example — 20 ft wall, 16 in O.C.
20 ft is 240 in. 240 ÷ 16 = 15 spaces, plus the end stud is 16 studs before corners and openings. A 3 ft door is not a three-stud save once kings and jacks are in.
Planning boundary
This is a planning stud count. It does not size members, hold-downs or a stamped wall.
Does this replace a framing plan?
No. Spacing, header size and hold-downs sit with the responsible professional.
What about a 24 in O.C. wall?
Change the spacing input. Do not convert a 16 in count by eye.
Are plates included?
No. Use the linear-lumber or board-foot tool for plates.