How to Frame a Wall: Stud Count, Lumber List & Cost
Framing a wall is one of the most fundamental carpentry skills. Getting your lumber list right before you start saves time, money, and a second trip to the lumber yard.
Quick Answer
For a standard 8-ft wall at 16" on center: use 1 stud per linear foot of wall + 3 plates (2 top plates + 1 bottom plate). A 10-foot wall needs 9 studs and 3 boards of 2×4×10 for plates — about 12 boards total. Add 2–3 extra studs per corner and 4 studs + header lumber per door or window opening.
Stud count by wall length (16" OC)
| Wall length | Estimate |
|---|---|
| 8 ft | 7 studs + 3 plates (2×4×8) |
| 10 ft | 9 studs + 3 plates (2×4×10) |
| 12 ft | 10 studs + 3 plates (2×4×12) |
| 16 ft | 13 studs + 3 plates (2×4×16) |
| 20 ft | 16 studs + 3 plates (2×4×20 or spliced) |
| 24 ft | 19 studs + 3 plates |
How to calculate stud count
The formula: (wall length in inches ÷ stud spacing in inches) + 1 = stud count. Round up to the next whole number. For a 10-foot wall at 16" OC: (120 ÷ 16) + 1 = 8.5 → 9 studs. At 24" OC: (120 ÷ 24) + 1 = 6 studs. Add 10% for waste and mistakes. The extra stud at the end accounts for the bookend stud — the formula gives you spaces, not studs, so you always add 1.
Complete lumber list for a basic wall
For a 10-foot non-load-bearing partition wall with one standard door: Studs (2×4×8 pre-cuts): 9 pieces. Top plates (2×4×10): 2 pieces. Bottom plate (2×4×10): 1 piece. Corner framing (if it's a corner wall): 3 extra studs. Door rough opening (3'0" door = 38" RO): 2 king studs + 2 jack studs (cut to 81") + double 2×10 header (or LVL beam) + cripple studs above. Total for wall with one door: approximately 18–20 pieces of 2×4 + header lumber.
Step-by-step framing process
1. Snap chalk lines on the floor for the wall location. 2. Cut the bottom plate to length; mark stud positions every 16" OC starting from one end. 3. Mark the same layout on your top plates (lay both together and mark simultaneously). 4. Cut all studs to height (ceiling height minus 4.5" for three plates). 5. Assemble the wall flat on the floor: lay studs between top and bottom plates and nail with two 16d nails per end. 6. Frame door and window openings with king studs, jack studs, and headers. 7. Tilt the wall up and brace it plumb. 8. Nail the bottom plate to the floor (concrete anchors or nails) and the top plate to ceiling joists or blocking.
Cost estimate
2×4×8 studs cost $4–6 each depending on region and grade. A 10-foot partition wall runs $60–90 in studs plus $15–25 in plate lumber — roughly $75–115 total for a basic wall. A 20-foot exterior wall with one window and one door: $150–250 in framing lumber plus $50–100 for the header. Add OSB sheathing for exterior walls at $25–40 per 4×8 sheet (you'll need about 8–10 sheets for a 20-foot wall). Professional framing labor: $2–5 per sq ft of wall area, or $25–60 per linear foot all-in installed.
Load-bearing vs partition walls
Partition walls divide space and carry no structural load — they're what this guide covers. Load-bearing walls carry the weight of floors, roofs, or other walls above and transfer it to the foundation. Before removing or moving any wall, determine if it's load-bearing: exterior walls and interior walls running perpendicular to floor joists are almost always load-bearing. Adding a load-bearing wall requires proper beam sizing (LVL or built-up lumber), post supports, and often a structural engineer review. Never guess on load-bearing work.
Pro Tip
Pre-cut all your studs to the same length before assembly — use a stop block clamped to a miter saw fence so every stud is identical. Framing a wall goes 3× faster when you're not measuring each stud individually.
Related Calculators
Frequently Asked Questions
What size lumber is used for wall framing?+
Standard interior walls use 2×4 lumber (actual size 1.5"×3.5"). Exterior walls in cold climates often use 2×6 (actual 1.5"×5.5") to fit R-21 insulation. The thicker wall also reduces thermal bridging through studs, improving energy performance.
Do I need a permit to frame a wall?+
Interior non-load-bearing partition walls generally don't require a permit in most jurisdictions. Any wall that's load-bearing, changes the structure, or affects electrical/plumbing typically requires a permit. Always check with your local building department before starting — fines for unpermitted work can exceed the project cost.
What's the difference between 16" and 24" on center?+
16" OC is the standard for most residential walls — it supports 1/2" drywall, works with all standard fixtures, and is accepted everywhere by code. 24" OC (Advanced Framing / OVE) uses 15–20% less lumber and reduces thermal bridging but requires 5/8" drywall and is not accepted in all jurisdictions for load-bearing applications. Use 16" OC unless your plans specifically call for 24" OC.
How do I frame around a door opening?+
Mark the rough opening (door width + 2"). Install king studs (full height) at each side. Install jack studs (trimmer studs) inside the king studs — these support the header and are cut to the height of the RO. Install the header (sized to span the opening — a 3' door needs a doubled 2×6 minimum; wider openings need larger headers or LVL). Add cripple studs above the header to the top plate, maintaining your 16" OC layout.