Estimate wall studs, top/bottom plates and material cost from wall length, spacing, openings and corners — metric or imperial.
Terminology only (plate vs. track). This calculator does not determine steel stud gauge, structural capacity, required track gauge or fastener specification - the count/spacing arithmetic remains geometric either way.
Enter the on-centre spacing specified by your approved plans, framing system or applicable requirements. These are commonly encountered layout values only, not a universal requirement: 400mm/600mm (metric) or 16in/24in (imperial).
Planning assumption only (default 4 ≈ 2 king + 2 jack studs). King and jack/trimmer studs are common in timber framing, but the actual framing around an opening depends on wall type, opening width, header/support arrangement, framing system and applicable requirements - this calculator does not model exact opening geometry.
Optional manual add-on — enter the count from your framing plan; this varies by corner/intersection method and isn't standardised here.
Optional spare-stud allowance, separate from installed studs and from plate waste. Installed studs are the studs used in the wall; studs to buy adds this allowance on top.
| Item | Value |
|---|
Enter your wall's length, height and maximum stud on-centre spacing on the Studs & Plates tab (or switch to multiple wall sections, each calculated independently and summed). Set the number of door/window openings and additional studs per opening (an editable planning assumption), plus any extra studs for corners or intersections. Choose a plate/track configuration and stock length for the number of pieces needed, and an optional stud purchase allowance. Use the Cost tab with your local prices for a material cost estimate.
Field stud count comes from dividing the wall length by your requested maximum on-centre spacing, rounding up to a whole number of spaces, then adding one for the final stud at the end of the run. Dividing the wall length by the actual number of spaces gives the actual resulting spacing, which is always at or tighter than what you requested.
16in (about 400mm) and 24in (about 600mm) on-centre are commonly encountered layout values, not a universal requirement. Enter the spacing specified by your plans, framing system or applicable requirements.
King and jack/trimmer studs are common in timber framing around a door or window opening, but the required configuration varies by wall type, opening width, header/support arrangement and framing system - this calculator does not model exact opening geometry. Instead, enter the number of openings and an editable "additional studs per opening" value (default 4, a planning assumption only, not a structural design); it does not size the header itself, which depends on the opening width, load above it and your span table or engineer's specification. Corners and T-intersections where one wall meets another also typically need extra studs beyond the field count, but the exact number varies by framing method (standard three-stud corner, two-stud corner with clips, California corner, and others) - enter the count from your specific framing plan.
Plates (or track, for metal stud framing) are the horizontal members studs are fastened to at the top and bottom of the wall. Each plate run must independently span the full wall length, so pieces are calculated per run - not by summing all run lengths together and dividing once, which can undercount the pieces actually needed.
This is a planning stock estimate - it does not optimise plate/track splice locations or reusable offcuts between runs. Follow the framing plan and applicable requirements for splices.
The Cost tab multiplies your entered stud and plate/track prices by the quantities calculated above (studs to purchase includes any purchase allowance). This is a material-only estimate - fasteners, connectors, headers, sheathing and labour aren't included unless you price them in separately. Timber and steel stud prices vary significantly by region, grade and gauge, so use your local supplier's current prices for an accurate total.
A 6m wall with 400mm maximum on-centre spacing, one door opening with 4 additional studs (planning assumption), no extra corner studs: number of spaces = CEILING(6 ÷ 0.4) = 15, field studs = 16, actual spacing = 400mm, plus 4 opening studs = 20 studs total. With a double top plate (3 runs) and 4.8m stock lumber at 10% waste: planning length per run = 6 × 1.10 = 6.6m, pieces per run = CEILING(6.6 ÷ 4.8) = 2, giving 2 × 3 = 6 plate pieces.
A common mistake is forgetting the "+1" end stud, which undercounts every wall by one stud. Another is summing all plate run lengths before dividing by stock length, instead of calculating pieces per run independently - since each run must span the wall on its own, this can undercount the physical pieces needed. It's also easy to forget opening and corner studs entirely, or to apply a waste allowance to the stud count the way you would to plate lumber - studs are bought as an exact count (with an optional separate purchase allowance), not cut from long stock.
This calculator is a material estimator only. It does not determine load-bearing capacity, required stud size, required stud spacing, timber species/grade, steel gauge, header size, lintel design, bracing, sheathing requirements, fastener schedules, connection design, or fire/acoustic requirements, and corner/intersection stud counts must be entered manually since framing methods vary. Follow your approved plans, manufacturer/framing-system guidance, local building requirements and qualified structural advice where required before building.
Divide the wall length by your stud on-centre spacing, round up to a whole number of spaces, then add one for the end stud - this gives the field stud count, alongside the actual resulting spacing (which is always at or tighter than your requested spacing). Then add planning-assumption studs for any door/window openings (editable, commonly 4 per opening) and for corners or wall intersections. Use the Studs & Plates tab above for an automatic count, or add multiple wall sections calculated independently.
16 inches (about 400mm) and 24 inches (about 600mm) on-centre are commonly encountered layout values, with 16in/400mm typical for load-bearing walls in many jurisdictions. These are examples only, not a universal requirement - enter the spacing specified by your approved plans, framing system or applicable requirements.
King and jack/trimmer studs are common in timber framing - typically 2 king studs (full height) and 2 jack studs (supporting the header) per opening - but the required configuration varies by wall type, opening width, header/support arrangement and framing system. This calculator uses an editable additional-studs-per-opening field (default 4, a planning assumption only) rather than modelling exact opening geometry; header sizing should follow your span table or engineer's specification.
For each independent plate run, the planning length is the wall length plus your waste allowance, divided by your stock lumber length and rounded up to whole pieces per run - then multiplied by the number of runs. Each run must span the wall length, so summing all run lengths before dividing by stock length can undercount the pieces needed. Use the Studs & Plates tab above for an automatic per-run calculation.
A double top plate (two stacked top plates) is common in many framing systems because it helps tie intersecting walls together and splices plate joints, while a single top plate is sometimes used with alternative bracing or connectors. Follow your approved plans or local requirements for which is required on your project.
Yes - tighter spacing (like 16in/400mm) needs more studs per metre of wall than wider spacing (like 24in/600mm). Wider spacing reduces material but may not be permitted for load-bearing walls or certain sheathing/cladding products - check your specific requirements before choosing a spacing. These are commonly encountered layout values only, not a universal requirement.
Stud cut length depends on your finished wall height, framing method (platform vs balloon framing) and plate thicknesses, and is not calculated by this tool - it only records the wall height you enter. Many regions sell precut studs matched to common wall heights (e.g. for a nominal 8ft or 2.4m wall). Confirm your exact required cut length against your framing plan before ordering or cutting.
The count/spacing arithmetic is the same - it's based on wall length and on-centre spacing regardless of material. Choose Metal/Steel Stud framing material above to switch plate terminology to top/bottom track. This calculator does not determine steel stud gauge, structural capacity, required track gauge or fastener specification - follow the manufacturer's or engineer's specification.
No - it is a material estimator only. It does not determine load-bearing capacity, required stud size or spacing, timber species/grade, steel gauge, header size, lintel design, bracing, sheathing, fastener schedules, connection design, fire/acoustic requirements or building-code compliance. Follow your approved plans, manufacturer/framing-system guidance, local building requirements and qualified structural advice where required.