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Calculate wall studs with multiple spacing options. Quick and accurate stud count for framing projects with 12", 16", or 24" on-center spacing.
Standard spacing is 16" OC for most walls
Add an extra stud at the wall end
Where length is in feet, spacing is in inches on-center, and each opening adds 2 studs
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Stud spacing refers to the distance between the centers of adjacent wall studs, measured "on center" (OC). This measurement system ensures consistent spacing throughout the wall, which is crucial for properly supporting drywall, sheathing, and other wall coverings.
Common stud spacing options:
Wall: 16 ft long, 16" OC spacing
Length in inches = 16 × 12 = 192"
Number of spaces = 192 ÷ 16 = 12
Base studs = 12 + 1 = 13
With 1 door = 13 + 2 = 15 studs
| Wall Type | Recommended Spacing | Stud Size | Notes |
|---|---|---|---|
| Load-bearing interior | 16" OC | 2x4 or 2x6 | Standard for most homes |
| Non-load-bearing | 24" OC | 2x4 | Check local codes |
| Exterior walls | 16" OC | 2x6 | Better insulation space |
| Heavy load areas | 12" OC | 2x6 | Extra structural support |
| Utility/storage walls | 24" OC | 2x4 | Cost-effective option |
Traditional wood studs (SPF, Douglas Fir)
Steel framing studs
LVL, LSL, or composite studs
The standard stud spacing for residential walls is 16 inches on center (OC). This spacing is required by most building codes for load-bearing walls and provides adequate support for drywall and other wall coverings.
Yes, but only for non-load-bearing walls or when specifically engineered and approved by local building codes. 24-inch spacing saves materials but requires proper design considerations for adequate wall support.
Interior walls typically use 2x4 studs (actual size 1.5" × 3.5"). Exterior walls and walls with plumbing often use 2x6 studs (actual size 1.5" × 5.5") for better insulation and to accommodate pipes.
Building codes specify minimum requirements for stud spacing based on wall type, stud size, and load conditions. Always check your local building codes before starting construction, as requirements vary by jurisdiction.
Yes, always order 10-15% extra studs to account for damaged lumber, cutting mistakes, and unforeseen needs. It's better to have extras than to stop work for additional materials.
"On center" (OC) measures from the center of one stud to the center of the next, while actual spacing is the clear space between studs. For 16" OC with 1.5" studs, the actual space is 14.5 inches.
Metal studs typically follow the same spacing guidelines as wood studs (16" or 24" OC), but the gauge (thickness) of metal may vary based on wall height and load requirements. Consult manufacturer specifications.
Standard drywall sheets (4' × 8') are designed for 16" or 24" OC spacing. Insulation batts are also manufactured for these spacings. Using non-standard spacing may require cutting materials to size, increasing waste and labor.
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