Wall Stud Calculator
Example: Wall length: 24 ft · Stud spacing (on center): 16 in · Doors and windows: 2 openings
| Studs needed | 23 |
| Plate boards | 9 |
| Wall length | 24 |
Worked example
A 24 foot wall framed 16 inches on center is 288 inches / 16 = 18, plus one for the far end, giving 19 field studs. Two openings add roughly two studs each for king and jack studs, so about 23 studs total. For plates, a double top plate and single bottom plate across 24 feet, cut from 8-foot boards, works out to about 9 plate boards. That is your framing lumber list in one shot.
Frequently asked questions
What spacing should I frame at?
Sixteen inches on center is the residential default and is required in many load-bearing situations, while 24 inches on center is allowed for some walls under advanced framing to save lumber. Set the spacing to match your plan and local code, since it directly changes the stud count.
Why add studs for openings?
Each door or window needs king studs on the sides, jack (trimmer) studs to carry the header, and often cripples above or below. This tool adds a simplified allowance of two extra studs per opening; a wide opening with a big header may need more, so treat it as a minimum.
What are the plate boards?
Plates are the horizontal boards at the top and bottom of the wall that the studs attach to. Most walls use a single bottom plate and a doubled top plate, so a wall needs roughly three plate lengths total, cut from standard boards. The calculator estimates that board count.
Does this include the header material?
No, headers over doors and windows are sized separately based on the span and the load above, using dimensional lumber or engineered beams. Size headers from a span table or an engineer, and add that material on top of the stud and plate count here.