Estimate studs and basic plate lumber for straight walls, multiple walls, or a rectangular room using user-entered wall lengths and on-center spacing, opening framing, corner assumptions, waste, stock lengths, and prices.
Each wall is laid out independently from one end using the spacing supplied by the user. Spaces round upward and one stud is added so both ends are represented.
Configurable corner, intersection, opening, and manual studs are added separately. Waste is then applied once to the combined stud estimate.
spaces = ceiling(wall length ÷ user-entered spacing); studs = spaces + 1wall length − floor(wall length ÷ spacing) × spacingceiling((basic + corner + opening + other studs) × (1 + waste % ÷ 100))wall length × (bottom runs + top runs)ceiling(plate length × (1 + waste % ÷ 100) ÷ stock length)A 20 ft wall at a user-entered 16 in OC spacing has 15 spaces and 16 basic studs. With 10% extra, 17.6 rounds upward to 18 studs.
A 19 ft wall at a user-entered 16 in OC spacing has 14 full bays and a 4 in final bay. Ceiling(14.25) gives 15 spaces and 16 basic studs.
A 20 ft wall with one bottom and two top runs needs 60 linear ft of plates. With 10% extra, 66 ft divided by 12 ft stock is 5.5, so buy 6 boards.
Spacing presets are editable calculation conveniences, not code recommendations.
Some king or jack studs may replace layout studs; this calculator reports them separately as a conservative purchase estimate.
Corners, intersections, headers, bearing conditions, lumber grade, and fastening require project-specific design.
The basic count already includes one stud at each wall end. It does not silently add double end studs or determine whether the entered spacing is structurally suitable.
Studs proceed from one end at the user-entered spacing limit. Only the final bay shortens; bays are not evenly redistributed.
Rectangular-room walls are calculated independently. End positions can overlap at shared corners, so corner framing is separately configurable and the result is intentionally conservative.
Editable king and jack studs per side plus manual opening studs estimate material quantity only. No cripple layout or structural header sizing is performed.
Bottom and top runs, stock lengths, and waste are user supplied. The project waste rate is applied once to total plate length before optional stock-board rounding.
Wood-framing design provisions address wall systems, connections, loads, and member properties beyond a quantity takeoff. This tool does not select code-compliant spacing, size headers, analyze loads, specify grades, or design connections. Wall height is planning context; it does not infer exact cut length or plate thickness.
Divide wall length by the user-entered spacing, round spaces upward, add one end stud, then include explicit extras and waste.
Using 16 inches OC as the supplied spacing, the basic independent-wall layout is 16 studs before extras and waste.
It is the distance from the centerline of one framing member to the next.
The layout maintains the user-entered spacing from one end and uses a shorter final bay.
Corner methods vary, so enter the project-specific extra count rather than relying on a universal assumption.
Enter editable king, jack, and manual opening extras. Some may replace regularly spaced studs.
Multiply total wall length by the entered run counts, apply waste once, and divide by the user-entered stock-board length.
Yes. Metric mode uses meters for walls and millimeters for spacing.
No. It does not perform structural header sizing.
No. It estimates quantities from spacing and framing assumptions supplied by the user.