Stud Wall Calculator

Count studs for a straight framed wall, with allowances for corners, openings and plates.

Worked example

6 m wall framed at 16 in on centre: 6 / 0.4064 = 14.8 spaces, rounded up to 15, plus the end stud gives 16 layout studs. Corners: 2 x 2 extra = 4. Openings: 1 x 4 extra = 4. Total: 16 + 4 + 4 = 24 studs. Plates: 3 runs x 6 m = 18 m of plate lumber.

How it works

Layout studs = wall length / spacing, rounded up, plus 1 end stud. Stated allowances: 2 extra studs per corner or wall end for drywall backing, 4 extra studs per opening (king, jack and cripple allowance), and plates counted as 3 runs of the wall length (double top plate, single bottom plate). Header material over openings depends on the load and span and is not included.

FAQ

When should I use 24 in spacing instead of 16 in?

24 in spacing is common for single-storey and non-load-bearing walls and saves lumber. Load-bearing walls, walls carrying upper floors or roofs, and many tile backers still call for 16 in. Check your local code and span tables.

Does the count include blocking and bracing?

No. Fire blocking, backing for cabinets and grab bars, and diagonal bracing are extra pieces. Add a few spare studs to the order for culls and mistakes as well.

Estimates only. This calculator gives planning estimates, not professional advice. Load-bearing framing is regulated: verify spacing and headers with your local building code.