Stud Calculator – Fast Wall Framing Takeoff
This stud calculator quickly estimates the studs you need for straight walls. Enter wall length and height, choose stud spacing (16" or 24" on-center, or 400/600 mm), add typical doors and windows, and include corners, tee intersections, plus a small waste allowance. The tool breaks out common studs, king studs, jack/trimmer studs, and cripple studs under windows.
How the Framing Math Works
- Base studs:
floor(wall length ÷ spacing) + 1(stud at both ends). - Openings remove commons across their span:
studs removed ≈ floor(width ÷ spacing). - King studs: 2 per opening; Jack studs: 2 per opening (one each side).
- Cripple studs below windows:
floor(width ÷ spacing) + 1. - Corners: 3-stud corner = +2 extras per end (over the end stud); 2-stud corner = +1 per end.
- Tees (intersections): +2 studs per tee.
Spacing Tips: 16″ vs 24″ (400 vs 600 mm)
16″ o.c. (≈400 mm) gives stiffer walls and lines up with most drywall/sheathing edges. 24″ o.c. (≈600 mm) saves lumber but can feel more flexible; check local code, wind/seismic requirements, and drywall thickness before choosing.
Openings, Corners & Tees
Each door or window adds king and jack studs and removes common studs under the span. Windows also need cripples below the sill. Framing corners and tee posts provide backing for drywall—your corner type changes how many extra studs you’ll need.
Note
Header sizing and structural requirements vary by span and code—use this for takeoff planning and verify details on your drawings or with a builder/engineer.