Framing & Stud Calculator
Enter wall length, on-center spacing, corners, and openings to get stud count and plate lumber needed.
This calculator gives an estimate for planning purposes only. Verify quantities and code requirements with a qualified professional before ordering materials or performing work.
How it's calculated
Field studs
studs = ceil((wall length in inches) / O.C. spacing) + 1
On-center spacing (16" or 24") sets how far apart studs sit; add 1 for the starting stud at the wall's beginning.
Corners and openings
total studs = field studs + corners + (openings × 2)
Corners need extra studs to tie intersecting walls together, and each door or window opening needs roughly 2 extra studs for king studs on either side (a simplified rule — actual jack/cripple stud counts vary by opening size and header design).
Plates
plate linear ft = wall length × 3 (2 top + 1 bottom)
Standard framing uses a doubled top plate and a single bottom plate — three total plate runs per wall length.
Stud count by wall length (2 corners, 1 opening)
| Wall length | 16" O.C. | 24" O.C. |
|---|---|---|
| 8 ft | 11 studs | 9 studs |
| 12 ft | 14 studs | 11 studs |
| 16 ft | 17 studs | 13 studs |
| 20 ft | 20 studs | 15 studs |
| 24 ft | 23 studs | 17 studs |
| 32 ft | 29 studs | 21 studs |
Skip the manual math on your next takeoff
Struvia reads your plans and pulls quantities like this automatically — upload a plan and see it measure a real takeoff.
Framing & Stud Calculator FAQ
Is this the same as a stud calculator?
Yes — stud count and framing calculations are the same math. This tool covers both wall stud count and the plate lumber needed for a complete wall.
16" or 24" on-center — which should I use?
16" O.C. is the most common residential spacing and required by many codes for load-bearing walls with certain sheathing. 24" O.C. is sometimes allowed for non-load-bearing walls or advanced framing approaches — check your local code and structural requirements.
Does this account for jack and cripple studs around openings?
It uses a simplified +2 studs per opening for king studs. Larger openings with headers need additional jack and cripple studs that this quick estimate doesn't break out — use it for a rough materials count, and verify against your framing plan for the actual opening sizes.