Framing Calculator

What to count

Wall length (or roof length for rafters)

Unit for lengths

Spacing on centre

Number of identical walls

Corners

Extra studs at each cornerA three-stud corner adds two studs beyond the one the layout already places there; a two-stud California corner adds one.

Partition intersections

Extra studs at each intersection

Door and window openings

Extra studs at each openingA king stud and a jack (trimmer) stud each side is four. Cripples above and below are extra and are not counted here.

Roof pitch, rise in 12

Building span (outside to outside)

Eave overhang, measured horizontally

Ridge board thickness (in)Half of it is deducted from each rafter run. A dressed 2x is 1.5 in thick under PS 20.

Price per stud or rafter (USD)

Pieces needed

Wall Stud & Rafter Calculator

Pieces from the spacing alone

Extra pieces for corners, intersections and openings

Plate material (bottom plate plus double top plate)

60.00 ft

Cost of the pieces

0.00 USD

Worked out from International Residential Code (IRC), Chapter 6 Wall Construction and Chapter 8 Roof-Ceiling Construction and 2 other sources.

Cripple studs above and below openings, blocking, and headers are not counted. Header size must come from a span table or an engineer’s design.

A quantity and geometry take-off only. It does not size any member and does not check spans, loads, bracing, uplift connections or header sizes; those must come from a licensed engineer’s design or from the prescriptive span tables of the code adopted where you build (e.g. IRC Tables R602.3(5) and R802.4).

How this is worked out

4 steps

Layout: floor(240 in / 16 in) + 1 = 16 studs per wall, x 1 wall(s) = 16.
Extras: 0 corner(s) x 2 + 0 intersection(s) x 2 + 0 opening(s) x 4 = 0.
Total studs = 16 + 0 = 16.
Plates: one bottom plate and a double top plate, so 3 x 20 ft x 1 = 60 linear feet.

Results are general information, not financial, tax, legal, medical or engineering advice.