Framing Calculator
Full wall framing material list: studs, plates, headers, blocking and sheathing.
What you need
63
Studs to buy — Includes wall studs, corner backing, and the extras each opening needs.
- Studs in the field
- 31
- Plate material needed
- 132.0 ft
- Plate boards (16 ft lengths)
- 9
- Sheathing panels (4x8)
- 11
- Wall area
- 320.0 sq ft
The regular run at your spacing, before openings and corners.
For one face of the wall.
Estimates for planning. Confirm quantities with your supplier before ordering — see the assumptions below for the figures used.
How to use the framing calculator
This calculates the whole framing package for a stud wall — studs at your chosen spacing, top and bottom plates, blocking, and sheathing panels — rather than just the stud count. Enter the wall length and height and adjust for openings.
What this calculator assumes
Every estimate depends on figures that vary by supplier and conditions. These are the ones used here, so you can sanity-check the result against your own quote.
- Field studs are one per spacing interval plus one to end the wall. Openings add 6 studs each (two kings, two jacks and cripple stock) and corners add 2 each for drywall backing — real framing varies with the detail used.
- Header stock is included only as part of the per-opening allowance. Headers over wide or load-bearing openings must be sized properly and are often engineered lumber.
- Plates are calculated as continuous runs of the whole wall length — 2 runs for single top, 3 for a double top plate.
- Sheathing covers one face at 32 sq ft per 4x8 panel. Interior partitions do not need sheathing.
- Stud spacing, wall height limits, header sizing and shear bracing are all code matters. This is a material estimate, not a structural design — load-bearing walls need proper sizing and usually a permit.
Frequently asked questions
How many studs do I need for a wall?
Divide the wall length in inches by the spacing and add one. A 40 foot wall at 16 inch centres is 480 ÷ 16 = 30, plus 1 = 31 field studs. Then add roughly 6 per opening and 2 per corner, and 10% for waste — which is how 31 becomes closer to 55 on a real wall.
Is 16 or 24 inch stud spacing better?
Sixteen inch centres is the residential default: stronger, stiffer drywall, and it lines up with standard insulation and sheathing. Twenty-four inch centres uses noticeably less lumber and is common in 2x6 exterior walls under advanced framing, but it needs ⅝ inch drywall on ceilings and careful attention to load paths.
Why does each opening need so many studs?
A door or window needs two king studs running full height, two jack studs supporting the header, cripple studs above (and below, for a window), plus the header itself. Six studs' worth of material per opening is a reasonable estimating allowance.
Do I need a double top plate?
For load-bearing walls, yes — it ties the framing together and lets joists or trusses land anywhere rather than only over a stud. Non-load-bearing partitions can use a single top plate, which is why the option is here.
Related calculators
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Count studs for a wall at 12, 16 or 24 inch spacing, and see where each one lands.
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Insulation Calculator
Work out how many bags or batts of insulation you need for walls, attics and floors.
Lumber Calculator
Work out how many boards you need for a run, plus linear feet, board feet and total cost.
Joist Calculator
Count floor or deck joists for a given span and spacing, plus rim joists, blocking and hangers.
Board Foot Calculator
Convert lumber dimensions into board feet and total cost — the unit hardwood is sold in.
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