Free wall stud calculator to estimate studs, plates, and framing lumber needed for walls. Calculate material quantities for 16" or 24" on-center spacing with door and window openings.
Assumes standard 3'×7' doors and 3'×4' windows
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Planning a wall framing project? Our wall stud calculator helps you determine exactly how many studs, plates, and framing materials you need. Whether you're framing an interior partition, exterior wall, or basement, get accurate material lists with cost estimates in seconds.
Wall framing uses vertical studs spaced at regular intervals (typically 16" or 24" on center) between horizontal top and bottom plates. A standard 8-foot wall uses precut studs (92-5/8") with a double top plate and single bottom plate. Door and window openings require additional framing: king studs frame the rough opening, jack studs support the header, and cripple studs fill above doors and below windows.
Basic Stud Formula
Studs = ⌊Wall Length ÷ Spacing⌋ + 1 + Opening Framing + CornersKnow exactly how many studs and how much plate lumber to buy.
Calculates king studs, jack studs, and cripples for doors and windows.
Get total material costs before visiting the lumber yard.
16" OC spacing meets code for load-bearing walls; 24" OC for non-bearing.
Buy the right amount without excess trips or leftover materials.
Non-load-bearing walls use 2×4 studs at 16" or 24" OC to divide rooms.
Load-bearing exterior walls use 2×6 studs at 16" OC for strength and insulation depth.
Frame basement walls against concrete with proper vapor barriers and insulation.
Frame garage interior walls with 24" spacing for non-bearing partitions.
Calculate complete framing packages for new room additions.
Build walk-in or reach-in closets with proper framing for shelving loads.
Use the formula: (Wall length in inches ÷ stud spacing) + 1. For a 12-foot wall at 16" OC: (144 ÷ 16) + 1 = 10 studs. Add more for corners, doors, and windows. This calculator handles all additions automatically.
16" OC is standard for load-bearing walls and provides better support for drywall. 24" OC uses fewer studs and is acceptable for non-load-bearing interior walls, though drywall may sag between studs if not 5/8" thick.
King studs run full height beside door and window openings. Jack studs (trimmers) are shorter studs that support the header beam above openings. Each opening needs 2 king studs and 2 jack studs.
Double top plates provide structural strength, allow walls to tie together at corners and intersections, and span gaps between studs. Single top plates are only used with special metal connectors or engineered framing systems.
For 8-foot ceilings, use precut studs (92-5/8" or 92-1/4"). For 9-foot ceilings, use 104-5/8" precut studs. For 10-foot ceilings, use standard 10-foot studs and cut to fit. Precut studs account for plates and floor/ceiling materials.
Use 2×6 studs for exterior walls (more insulation space), load-bearing walls requiring extra strength, walls taller than 10 feet, and areas with high wind loads per local building codes.
Standard corners use three studs—two studs form the outside corner with a third providing nailing surface for interior drywall. Advanced framing uses two-stud corners with drywall clips, saving lumber and improving insulation.
Prices vary by region and market conditions. As of 2024, expect $3-6 per 8-foot 2×4 stud and $5-9 per 8-foot 2×6 stud. Plate lumber costs $0.50-1.00 per linear foot. Get current prices from your local supplier.