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.
Important Estimate Disclaimer
The results provided by this calculator are intended as general estimates only and should not be considered precise engineering measurements. Actual material requirements, costs, and quantities can vary significantly based on site conditions, local building codes, soil type, reinforcement requirements, climate exposure, and the intended use of your project.
These calculators are designed to help you plan and budget your project more effectively, but they do not replace professional advice from a qualified contractor, engineer, or building inspector. Always verify your calculations and assumptions with trained professionals before placing material orders or commencing construction.
For more information on the assumptions, formulas, and data used in these tools, see our Data Sources and Methodology pages.
Material estimates, cost figures, and volume calculations are approximate and may not reflect your actual requirements. Always double-check dimensions and project-specific needs, and consider adding a contingency allowance for waste, over-excavation, and unforeseen conditions.
If you are unsure about any aspect of your project — including structural requirements, reinforcement needs, drainage, or load-bearing capacity — consult with a licensed professional before proceeding.