TryBuildCalcMetal Stud Framing Calculator (Studs, Track & Screws for Interior Partitions)
Estimate the stud, track, and screw takeoff for a steel-framed interior partition wall, including real door/window header framing.
🕒 Last updated: October 11, 2026
Inputs
Section 1: Wall Dimensions
ℹ️Floor to the underside of the top track — must not exceed the Stock Length selected below.
ℹ️Set to more than 1 if several identical wall runs need the same framing.
Section 2: Framing
ℹ️16 in o.c. is standard for walls receiving tile, heavy fixtures, or taller partitions; 24 in o.c. is common for typical interior partitions.
ℹ️1-5/8 in (EQ) is the standard non-structural drywall-partition profile. Wider profiles are chosen for taller walls, extra cavity depth for insulation/plumbing, or a deeper header extension.
ℹ️The precut stud/track length to buy — must be at least the wall height (field/king/jack/cripple studs are each cut from a single piece, never spliced).
ℹ️Maximum fastener spacing for track into the floor/ceiling structure per ASTM C754 is 24 in o.c.
Section 3: Door & Window Openings
Each opening adds real king studs, jack (trimmer) studs, a boxed header, and cripple studs — not just a stud-count deduction.
Opening 1
Leave this section empty for a plain wall with no doors or windows.
Section 4: Wastage & Cost
ℹ️Metal stud/track wastage is typically lower than wood — 5% is a reasonable default for bent/damaged pieces and mis-cuts.
14 stud pieces + 3 track pieces
For 1 wall(s), 12.0 ft total run, 1 opening(s).
Studs
Stock Pieces to Buy: 14 pcs (10 ft each)
Framing Members Needed: 16 members
Field Studs: 8 pcs
King Studs: 2 pcs
Jack (Trimmer) Studs: 2 pcs
Cripple Studs (Above Header): 4 pcs
Stock pieces are fewer than framing members because several short jack/cripple studs are cut from one stock piece.
Track
Track Pieces: 3 pcs (10 ft each)
Top Track: 12.0 ft
Bottom Track: 9.0 ft
Header Track (Boxed): 6.5 ft
Screws
Total Screws: 102 pcs (2 box(es) of 100)
Stud-to-Track/Header/Sill: 56 pcs
Jack Stitch Screws: 14 pcs
Header Box Screws: 12 pcs
Track-to-Structure: 15 pcs
Quick Insight
Calculated by laying out real stud positions at 16 in o.c., adding king/jack/header/cripple framing for 1 opening(s), bin-packing all 16 framing members and pooling track into whole 10 ft stock pieces, with 5% wastage.
Approximate results for planning only. Verify with a professional.
Metal Stud Wall Framing Layout
What Is a Metal Stud Framing Calculator?
If you're asking "how many steel studs do I need for this wall" or "how do I frame a door opening in a metal stud wall," this calculator answers it with a detailed takeoff — field studs at your chosen on-center spacing, plus king studs, jack (trimmer) studs, a boxed header, and cripple studs for every door and window opening, following the same king/jack/header/cripple framing arrangement commonly used for non-structural interior partitions.
It is built for contractors and drywall installers pricing a partition wall, and for homeowners/DIYers planning a steel-framed interior wall, as a companion to the Drywall Sheet Calculator (sheets once this wall is framed) and the Batt & Roll Insulation Calculator (cavity insulation), which this calculator deliberately does not re-derive.
What makes this calculator different:
Most online stud calculators only count field studs and, at best, subtract a few studs for an opening. That undercounts materials for any wall with a door or window — a real opening needs full-height king studs, shorter jack studs supporting a header, the header itself (boxed from 2 pieces of track), and cripple studs filling the gap above the header (and below a window's sill). This calculator models that king/jack/header/cripple arrangement, broadly consistent with ClarkDietrich's published non-structural steel stud installation guidance, rather than a bare stud-count deduction — and then bin-packs every individual member's real cut length against the selected stock length, so short jack/cripple studs that share one stock piece aren't each counted as needing their own.
Applicable standards:
- ASTM C645 specifies material and manufacturing requirements for nonstructural steel framing members (the 25-gauge studs/track this calculator is scoped to).
- ASTM C754 specifies installation requirements, including the 24 in o.c. maximum fastener spacing used for track-to-structure screws here.
- This calculator estimates framing materials quantity and cost only, not a structural design, shop drawing, or code compliance determination.
How the metal stud framing calculation works
Field studs are laid out across the run, then every opening adds its own king, jack, and cripple studs plus a boxed header and (for a window) a sill track — each as a real, separately counted framing member.
Step 1 - Field studs
Effective Run = Wall Length - Sum of Opening Widths
Field Studs = CEIL(Effective Run x 12 / Spacing) + 1
The same standard layout rule used by this site's Batt & Roll Insulation Calculator — one stud at each end, plus one every spacing interval in between, with the openings' linear footage removed first.
Step 2 - Opening framing (per opening)
King Studs = 2, full Wall Height
Jack Studs = 2, Header Bottom Height (= Door Height, or Sill + Window Height)
Cripples Above Header = CEIL(Opening Width x 12 / Spacing) + 1, if any gap remains to the top track
Cripples Below Sill (window only) = CEIL(Opening Width x 12 / Spacing) + 1
Every member here is a single piece cut from one stock-length piece — never spliced partway up — which is why Stock Length must be at least the Wall Height (and why a header, below, must fit within the Stock Length too).
Step 3 - Stock pieces via bin-packing
Framing Members = Field + King + Jack + Cripple Studs, x Wall Count
Stock Pieces (raw) = bin-pack every member's real cut length against Stock Length
Stock Pieces to Buy = CEIL(Stock Pieces (raw) x (1 + Wastage%))
Every individual member is one uncut piece, but several SHORT members (jack and cripple studs) routinely fit together on one stock piece — this bin-packs every member's exact length (longest first, first-fit) to find a practical estimated purchase count, rather than assuming one stock piece per member, which overstates materials for any wall with openings. First-fit-decreasing is a standard, realistic heuristic, not a guaranteed mathematical minimum — see Limitations.
Step 4 - Header & track
Header Length = Opening Width + 2 x Stud Width (boxed = 2 track pieces)
Top Track = Wall Length (continuous, unaffected by any opening)
Bottom Track = Wall Length - Sum of Door Widths (windows do NOT reduce it)
Sill Track (window only) = Opening Width
Track Pieces = CEIL((Top + Bottom + Header x2 + Sill) x (1 + Wastage%) / Stock Length)
Track runs horizontally and can be spliced end-to-end, so its total linear footage is pooled across the whole job before dividing into whole stock pieces — unlike a vertical stud, which can't be. A header's own length must still fit within the Stock Length, since it is one continuous boxed piece spanning the opening, not spliced mid-span.
Step 5 - Screws
Stud-to-Track/Header/Sill = 4 screws each (field, king, cripple)
Jack Stitch Screws = ~1 per ft of jack height (min 2) x jack count
Header Box Screws = boxing screws (12 in o.c.) + 4 end screws
Track-to-Structure = CEIL((Top + Bottom Track only) x 12 / Fastener Spacing) + 4
Track-to-structure fasteners only apply to the top and bottom track, which are the only pieces actually fastened to the floor/ceiling structure — a header and a sill track are fastened to the jack studs instead (counted separately above). Fastener spacing defaults to the ASTM C754 maximum of 24 in o.c. and can be tightened in the inputs above.
Real-World Metal Stud Framing Calculation Example
This example uses the active calculator inputs above and follows the same steps from the formula section.
Input Values Used
| Input | Value | Why it is used |
|---|---|---|
| Wall | 12 ft x 9 ft, x1 | Sets the field stud count and track lengths |
| Framing | 16 in o.c., 1-5/8 in (standard non-structural) | Sets stud spacing and header overhang |
| Openings | 1x Door (3 ft) | Adds king/jack/header/cripple framing |
Step 1 — Framing Members
Every individual field/king/jack/cripple stud this job needs, across all 1 wall(s) — not yet the stock-piece purchase count (see Step 2).
| Member | Calculation (per wall) | Total (1 wall(s)) |
|---|---|---|
| Field Studs | CEIL(9 ft x 12 / 16) + 1 = 8 | 8 |
| King Studs | 2 per opening = 2 | 2 |
| Jack Studs | 2 per opening = 2 | 2 |
| Cripples Above Header | Per opening width/spacing = 4 | 4 |
| Total Framing Members | Sum above | 16 |
Several short jack/cripple studs are cut from one 10ft stock piece together, so the real purchase quantity is found by bin-packing every member's exact length against the stock length — not by buying one stock piece per member.
| Step | Calculation | Result |
|---|---|---|
| Bin-packed stock pieces | 16 members packed into 10 ft pieces | 13 |
| Stock Pieces to Buy (+5% wastage) | CEIL(13 x 1.05) | 14 |
Step 2 — Track & Screws
| Item | Calculation | Result |
|---|---|---|
| Track Linear Footage | Top + Bottom + Header + Sill, x 1 wall(s) | 27.5 ft |
| Track Pieces (10 ft each) | CEIL(Total / Stock Length) | 3 |
| Total Screws | Stud + jack + header + sill + track fasteners | 102 (2 box(es) of 100) |
Therefore, for this wall you need an estimated 14 stud pieces and 3 track pieces.
Essential Checklist+−
Complete these critical checks before approving the work or proceeding to the next construction stage.
✓Wall Setup+-
- Wall length (run) and wall height were measured on site, not assumed from a floor plan.
- Wall height does not exceed the selected Stock Length — a taller wall needs a longer precut stud/track size, not a spliced stud.
- Stud Spacing (16 or 24 in o.c.) matches the project specification — 16 in is typically required for tile, heavy fixtures, or taller partitions.
✓Door & Window Openings+-
- Every door and window in this wall run was added as its own opening row, with the correct type selected.
- Window sill height and window height were both entered, and their sum does not exceed the wall height.
✓Stud Takeoff+-
- King stud count (2 per opening) and jack stud count (2 per opening) were confirmed against the actual number of distinct openings, not opening TYPES.
- "Stock Pieces to Buy" (the purchase count) is understood as LOWER than "Framing Members Needed" by design — short jack/cripple studs are bin-packed together onto shared stock pieces, not each bought as its own piece.
✓Track & Header+-
- Top track total matches the full wall run — top track is NOT reduced for any opening, door or window.
- Bottom track total is reduced only for door openings, not window openings — a window's sill sits above the floor track.
✓Screws & Cost+-
- Cost estimate is understood as framing materials only — drywall, insulation, and joint compound are priced separately via their own calculators.
Full QC Checklist+−
Verify wall setup, opening framing, stud takeoff, track/header quantities, and screws/cost before ordering materials.
✓Wall Setup+-
- Wall length (run) and wall height were measured on site, not assumed from a floor plan.
- Wall height does not exceed the selected Stock Length — a taller wall needs a longer precut stud/track size, not a spliced stud.
- Number of Identical Walls matches how many separate wall runs actually share this exact length, height, spacing, and opening layout.
- Stud Spacing (16 or 24 in o.c.) matches the project specification — 16 in is typically required for tile, heavy fixtures, or taller partitions.
- Stud Width (depth) matches the actual profile being ordered — it also sets how far the header extends past the opening to reach the king studs.
✓Door & Window Openings+-
- Every door and window in this wall run was added as its own opening row, with the correct type selected.
- Door opening height is the full floor-to-header rough opening height (commonly 6'8"-7'0"), not the finished door slab height.
- Window sill height and window height were both entered, and their sum does not exceed the wall height.
- "Identical Openings" count reflects how many openings of that exact size exist in this wall run, not the total openings in the whole project.
- Opening widths were measured as the ROUGH OPENING width (jack-stud to jack-stud), not the finished door/window unit width.
- No single opening's boxed header (opening width + 2x stud width) exceeds the selected Stock Length — wider spans need an engineered structural header, outside this calculator's boxed-track model.
✓Stud Takeoff+-
- Field stud count was cross-checked against the Visualization diagram's layout for a sanity check before ordering.
- King stud count (2 per opening) and jack stud count (2 per opening) were confirmed against the actual number of distinct openings, not opening TYPES.
- Cripple stud counts above the header (and below the sill, for windows) were not skipped — these are easy to forget when tallying a materials list by hand.
- "Stock Pieces to Buy" (the purchase count) is understood as LOWER than "Framing Members Needed" by design — short jack/cripple studs are bin-packed together onto shared stock pieces, not each bought as its own piece.
- Total stock-piece count already includes the wastage % added — do not add a second manual wastage allowance on top.
✓Track & Header+-
- Top track total matches the full wall run — top track is NOT reduced for any opening, door or window.
- Bottom track total is reduced only for door openings, not window openings — a window's sill sits above the floor track.
- Header track quantity accounts for BOTH pieces of the boxed header, not just one.
- Track piece count was converted to the selected Stock Length, with wastage applied before rounding up to whole pieces.
✓Screws & Cost+-
- Screw totals were rounded up to whole boxes of 100 before ordering, with a few spares on hand for dropped/stripped screws.
- Track-to-structure fastener spacing matches the actual floor/ceiling substrate and code requirement (ASTM C754, 24 in o.c. maximum).
- Cost estimate is understood as framing materials only — drywall, insulation, and joint compound are priced separately via their own calculators.
- Currency and unit cost entries reflect current local supplier pricing, not a placeholder default.
Reference Tables
Standard non-structural stud/track widths (ASTM C645)
| Width | Common Use |
|---|---|
| 1-5/8 in | Standard interior drywall partition (EQ profile) |
| 2-1/2 in | Slightly deeper partition, more cavity room |
| 3-5/8 in | Common for taller partitions or added service cavity |
| 4 in | Deep partition, plumbing/electrical chases |
| 6 in | Deepest common non-structural partition profile |
Stock lengths & fastener spacing
| Item | Typical Value | Source |
|---|---|---|
| Stud/track precut stock lengths | 8, 9, 10, 12 ft (this calculator's range; longer lengths exist but aren't modeled here) | Standard manufacturer stock sizes |
| Max track-to-structure fastener spacing | 24 in o.c. | ASTM C754 |
| Max field stud spacing | 16 or 24 in o.c. | ASTM C754 / common practice |
| Header-to-jack/king boxing screw spacing | ~12 in o.c. | Common trade practice for boxed track headers |
Confirm exact gauge, profile, and fastener requirements against the project specification or local code before finalizing an order — these figures are general planning guidance only.
How to Use the Metal Stud Framing Calculator
- Enter the wall's length and height, and how many identical wall runs need the same framing.
- Choose the stud spacing (16 or 24 in o.c.), stud width, and a stock length long enough to cover the wall height in one piece.
- Add one row for every door or window opening in this wall run, with its width, height (and sill height for a window), and how many identical openings of that size exist.
- Set Wastage % and, if needed, Track Fastener Spacing to match your structure/code requirement.
- Turn on cost estimation to price just the framing materials (studs, track, screws) and optional labor.
Practical Metal Stud Framing Tips
- Lay out and mark every stud position on the top and bottom track before standing a single stud — it is far easier to catch a layout mistake on the floor than after studs are up.
- Pre-drill or use self-drilling pan-head screws for stud-to-track connections — forcing a screw through 25-gauge steel without a self-drilling tip or pilot can deform the light-gauge flange.
- Box a header's 2 track pieces together on a flat surface before lifting it into place — it is far easier to align and screw the pieces together on the ground than overhead between the jacks.
- Check the wall for plumb and the track for straight runs every few studs, not just at the end — steel track can bow slightly and is easy to correct early, hard to fix once drywall is hung.
- Leave the bottom track uncut under a door opening until the door frame/jamb is actually being set — cutting it too early can let the wall rack out of square before the opening is framed solid.
Common Mistakes
- Subtracting a flat number of studs for a door/window instead of adding the real king/jack/header/cripple members that opening actually needs.
- Measuring a door or window's FINISHED unit size instead of the ROUGH OPENING size the jack studs actually need to clear.
- Forgetting that a window's sill track and the cripple studs below it are separate materials from the bottom track that runs underneath the whole wall.
- Buying stock length equal to the wall height exactly, leaving zero margin for a slightly out-of-level floor or ceiling.
- Using 24 in o.c. spacing on a wall that will carry wall-mounted cabinets, grab bars, or heavy fixtures without adding blocking at the actual fixture locations.
- Skipping the screws that box a header's 2 track pieces together, leaving a header that can rack or twist under the drywall's own weight.
Metal Stud Framing Calculator Limitations
- This calculator is scoped to non-structural interior partition walls (25-gauge ASTM C645 profiles) — it does not cover load-bearing or structural steel framing, which needs an engineer-specified gauge, connection design, and often a cold-formed steel design software package.
- Openings wider than roughly 12 ft need an engineered structural header beyond a simple 2-piece boxed track, and are outside this calculator's scope — the header-length check also rejects any opening whose boxed header would exceed the selected Stock Length.
- Opening position along the wall run is not modeled. Field stud count is derived from the wall's total length minus the COMBINED width of every opening, not each opening's actual position — two walls with the same total opening width but openings in different places will return the same field stud count, even though they interrupt the layout grid differently in reality. This is a conservative planning estimate, not an exact stud-by-stud position plan.
- Corner/intersection backing studs, blocking for wall-mounted fixtures, and acoustic/fire-rated assembly requirements are not modeled — add these separately per the project specification.
- Suspended ceiling grids (main runner/cross tee systems) are a different product system entirely and are not covered here.
- Screw counts are planning estimates based on common trade practice, not a substitute for the specific manufacturer's or project specification's fastening schedule.
- Stock-piece bin-packing (Formula Step 3) uses a standard first-fit-decreasing heuristic — it finds a realistic, near-minimal piece count, not a mathematically guaranteed optimum; an experienced installer's own cut list may do marginally better or worse depending on the exact mix of lengths.
- Drywall sheets, cavity insulation, and joint finishing materials are not estimated here — see the Drywall Sheet, Batt & Roll Insulation, and Drywall Mud/Tape Calculators for those.
Related Construction Calculators
You may also find these calculators useful for the same wall:
- Drywall Sheet Calculator
Estimate the exact sheet count and screws once this wall is framed.
- Batt & Roll Insulation Calculator
Estimate the exact batt/roll count for this wall's cavity insulation.
- Drywall Mud Calculator
Estimate joint compound and tape once drywall is hung.
- Soundproofing Calculator
Estimate the STC rating this same wall will achieve.
Disclaimer: This calculator provides approximate results for planning and estimation purposes only. Actual requirements may vary based on site conditions, materials, workmanship, and local building regulations. Always consult a qualified engineer, architect, or construction professional before making final decisions.