Lumber Cost Calculator — House, Deck, Fence & Shed Costs
Enter your project type and size, pick a species, and get a board-foot estimate plus a total lumber cost range in seconds. Coefficients and prices below are planning references, not quotes — the tool exists to size your budget before you call the lumber yard.
💵 Lumber Cost Calculator
House framing · deck · fence · shed — board feet and total cost from project size
Step 1 · Project type
Studs, plates, floor joists, rafters or truss lumber, headers and blocking. Excludes sheathing, engineered lumber (LVL, I-joists), windows and finishes.
Step 2 · Size, species & waste
Tip: dimension-lumber yards often price common framing sizes well below the per-BF reference — use Custom price ($1.50–$2.25/BF is a common effective range) to model piece pricing.
Results · House framing
Board feet (incl. waste)
17,600BF
Cost range
$46,200 – $77,000
Midpoint cost
$61,600
Est. pieces
2,200
| Size | Share of BF | Board feet | Cost |
|---|---|---|---|
| 2×4 | 35% | 6,160 | $21,560 |
| 2×6 | 28% | 4,928 | $17,248 |
| 2×8 | 15% | 2,640 | $9,240 |
| 2×10 | 12% | 2,112 | $7,392 |
| 4×4 | 10% | 1,760 | $6,160 |
Coefficient used: 6.0–10.0 BF per sq ft of floor area, midpoint ×1.10 waste multiplier.
How the lumber cost calculator works
Every number the calculator produces comes from one deliberately simple chain. First, a board-foot-per-square-foot coefficient converts your project size into total board feet: nobody wants to count 3,000 studs on a napkin, so builders rely on takeoff-derived rules of thumb instead. Second, a waste multiplier pads the volume for cutoffs, defects, and mis-cuts — 10% for standard framing, 15% for diagonal decking, 8% for straight-cut fence pickets. Third, the waste-adjusted board feet are multiplied by the price per board foot of the species you selected, giving the total lumber cost. The low and high ends of each coefficient produce the cost range, so you see a band rather than a false-precision single number.
The same chain works in reverse, and that is the fastest way to sanity-check any quote: divide a quote's lumber total by its board footage and compare the effective per-BF price against the species table below. If a framing package implies $5 per board foot for SPF stud lumber, something in the quote — delivery, treatment, a premium grade, or padding — deserves a second look.
The board-foot-per-square-foot coefficients
The coefficients encode how much framing lumber a typical build carries per unit of size. A wood-frame house carries roughly 6–10 board feet per square foot of floor area — a simple single-story ranch with 8-foot walls sits near the low end, while a two-story with tall walls, long spans, and many openings pushes toward the high end. Decks carry 3–5 BF per square foot because structure and decking scale together. Sheds and garages carry 4–6 BF per square foot — more wall per square foot of floor than a house, less roof span. Fences are measured per linear foot because their footprint is a line, not an area: a 6-foot privacy fence carries about 2.5 BF per linear foot, and a board-on-board version nearly doubles it.
| Project | Input unit | Low | Midpoint | High |
|---|---|---|---|---|
| House framing | per sq ft of floor area | 6 | 8 | 10 BF / sq ft |
| Deck | per sq ft of deck surface | 3 | 4 | 5 BF / sq ft |
| Shed / garage | per sq ft of floor area | 4 | 5 | 6 BF / sq ft |
| 6 ft privacy fence | per linear ft of fence | 2 | 2.5 | 3 BF / linear ft |
| 6 ft board-on-board fence | per linear ft of fence | 3.5 | 4 | 4.5 BF / linear ft |
| 4 ft open picket / rail | per linear ft of fence | 1 | 1.5 | 2 BF / linear ft |
Reference estimate — replace with local supplier quotes. Ranges compiled from NAHB and AWC framing takeoff rules of thumb and published contractor estimating guides; actual takeoffs vary with wall height, spans, and opening count.
From board feet to dollars
Pricing is the easy half once board feet are known: total cost = waste-adjusted BF × price per BF. Pick a species from the dropdown and its reference price fills in automatically, or choose Custom price to model exactly what your yard quoted. Wholesale and mill quotes often arrive per thousand board feet (MBF) instead — divide by 1,000 to convert, so $600/MBF is $0.60 per BF. One honest caveat: species reference prices describe how hardwood and rough-sawn stock trade. Common framing sizes are usually sold per piece at retail, which changes the effective per-BF math — the cross-check section below shows how to handle it.
How much does lumber cost to build a house?
It is the first question every builder asks — and the honest answer is that "lumber cost to build a house" means three different budgets depending on scope. The framing lumber package (dimensional lumber only: studs, plates, joists, rafters, blocking) is what this page and the calculator above estimate. The structural materials total adds sheathing, engineered lumber, and hardware, typically running 40–60% above the framing package. The whole-house materials budget adds windows, roofing, siding, electrical, plumbing, and finishes — several multiples of the framing number. Keep the scopes separate or every comparison you make will be apples to oranges.
For the framing package itself, the geometry is simple: a typical wood-frame house carries 6–10 board feet of lumber per square foot of floor area. That means a 2,000 sq ft home contains on the order of 16,000 board feet — about 3,000 studs' worth of wood volume spread across walls, floors, and roof. What that costs depends entirely on the price per board foot you lock in, which is why the table below shows two pricing bases side by side.
Lumber cost for a 1,000, 1,500, and 2,000 sq ft house
The table below applies the house coefficients to common floor areas, with a 10% waste allowance built in. The first cost column uses the site's SPF reference price of $3.50 per board foot — the conservative, high-side view. The second column uses $1.75 per BF, an effective rate that models piece-priced dimension lumber (explained in the cross-check section). Both columns are a reference estimate — replace with local supplier quotes.
| Floor area | Board feet (low–high) | Cost at SPF $3.50/BF | Cost at piece pricing $1.75/BF |
|---|---|---|---|
| 800 sq ft | 4,800 – 8,000 | $18,480 – $30,800 | $9,240 – $15,400 |
| 1,000 sq ft | 6,000 – 10,000 | $23,100 – $38,500 | $11,550 – $19,250 |
| 1,200 sq ft | 7,200 – 12,000 | $27,720 – $46,200 | $13,860 – $23,100 |
| 1,500 sq ft | 9,000 – 15,000 | $34,650 – $57,750 | $17,325 – $28,875 |
| 2,000 sq ft | 12,000 – 20,000 | $46,200 – $77,000 | $23,100 – $38,500 |
| 2,500 sq ft | 15,000 – 25,000 | $57,750 – $96,250 | $28,875 – $48,125 |
Includes 10% waste allowance. Reference estimate — replace with local supplier quotes. Excludes sheathing, engineered lumber, hardware, and delivery.
Reading the table: a 1,000 sq ft house — a cottage, ADU, or small starter home — carries 6,000–10,000 BF and lands between roughly $6,600 and $19,300 at piece pricing, or up to $38,500 if you price everything at the per-BF reference. A 1,500 sq ft house scales to 9,000–15,000 BF. The 2,000 sq ft home — the most-asked-about size — carries 12,000–20,000 BF, and 2,500 sq ft pushes toward 25,000 BF at the high coefficient. Garage add-ons behave like sheds (4–6 BF per sq ft of garage floor), and a detached two-car garage at 600 sq ft therefore adds roughly 2,400–3,600 BF to a property's lumber budget.
What's inside a house lumber package?
A framing package is mostly dimension lumber in five roles. Walls consume the most volume: studs at 16 or 24 inches on center, doubled top plates, sole plates, and jack and king studs flanking every door and window. Floors take joists — 2×8 to 2×12 depending on span — plus rim boards and blocking. Roofs take rafters or the lumber allowances in truss orders. Headers over openings use 4×4, 4×6, or built-up 2× stock (engineered LVL is quoted separately). Blocking, bracing, and plates round out the remainder. The calculator's size-mix table reflects this: roughly a third of the volume in 2×4 wall stock, a quarter or more in 2×6, and the rest spread across floor and roof sizes. When you compare bids, make sure each bidder is pricing the same five roles — a "cheap" package that omits plates and blocking is not cheap.
Average lumber cost to frame a house: the per-square-foot cross-check
Here is the nuance that trips up first-time estimators. Board-foot reference prices are how hardwood and wholesale stock trade — but the 2×4 studs, 2×6 joists, and 1×6 pickets in a framing package are sold per piece at retail. A 2×4×8 SPF stud at $3.50–$4.50 each contains 5.33 board feet, so its effective rate is about $0.66–$0.84 per BF — far below the $3.50 per-BF reference. Multiply that bias across a whole package and piece-priced framing typically lands at $12–$18 per square foot of floor area for the lumber itself in 2025–2026 (reference estimate — replace with local supplier quotes).
Practically, this means the per-BF method at reference prices is your ceiling, and piece pricing is the floor. To model piece pricing inside the calculator, pick Custom price and enter $1.50–$2.25 per BF. If your local quotes sit between the two columns of the table above, you are looking at a normal market; if they exceed the ceiling, ask what grade, treatment, or delivery charge is driving it.
Lumber cost to frame a basement
Finishing a basement adds framing that behaves like interior walls: partition studs, furring strips on foundation walls, soffits around ducts and beams, and box-outs for egress windows. A practical allowance is 1.5–2.5 BF per square foot of finished basement area on top of the house shell (reference estimate — replace with local supplier quotes). A 1,000 sq ft basement finish therefore adds roughly 1,500–2,500 BF. Walkout basements and home theaters with double walls run higher; and remember that basement framing is usually moisture-resistant or kiln-dried stock, which prices above standard SPF per piece.
Lumber cost per square foot — the fastest estimating shortcut
Fold the coefficient and the price together and you get the number contractors actually quote from: lumber cost per square foot. At the SPF reference price of $3.50 per BF with a 10% waste allowance, the midpoints work out to about $30.80 per sq ft for house framing (8 BF × $3.85), $19.25 per sq ft for sheds (5 BF × $3.85), $15.40 per sq ft for decks (4 BF × $3.85), and about $9.60 per linear foot for a 6-foot privacy fence (2.5 BF × $3.85). At effective piece pricing of $1.75 per BF, the house figure drops to roughly $15.40 per sq ft — which is exactly the band where real framing packages usually quote.
Use per-square-foot figures for speed and per-board-foot figures for precision. When you are three years out from breaking ground and just want to know whether lumber is 10% or 30% of your budget, multiply floor area by the per-square-foot band and move on. When you are a month out, run the exact area through the calculator, get the board feet, and take written quotes from two or three yards. Every shortcut number in this paragraph is a reference estimate — replace with local supplier quotes.
How much lumber cost for a deck?
A deck's lumber budget splits into two layers: the structure (joists, beams, rim boards, posts, stair stringers) and the decking you walk on. Together they run 3–5 board feet per square foot of deck surface — lower than a house because a deck has no walls and one level of roof-free floor. The species choice matters more for decks than for houses: pressure-treated pine is the budget baseline, cedar and redwood climb steadily, and tropical hardwoods can triple the per-BF price. Since pressure-treated pine is priced per piece at most yards, entering a custom $2.50–$3.50 per BF in the calculator models it more faithfully than the SPF reference does.
Worked example: a 12×16 deck
Take the most common DIY size: 12 × 16 feet = 192 sq ft of deck surface. Applying the 3–5 BF per sq ft coefficient gives 576–960 board feet, midpoint 768 BF. With a 10% waste allowance that is about 845 BF. At the SPF reference price of $3.50 per BF, the lumber budget lands between roughly $2,220 and $3,700, midpoint near $2,960 — and at a custom PT-pine rate of $3.00 per BF it drops to about $2,530. The piece estimate comes out around 85 to 95 boards once you divide by an average piece size. That is the order of magnitude to carry into your quote calls, and it excludes footings, hardware, and railing infill.
Diagonal decking and the 15% waste factor
Waste is where deck budgets quietly leak. Perpendicular decking on a rectangular frame wastes about 10% — butt joints and board ends. Run the boards diagonally and every board gets angle cuts at both ends, pushing waste to 15%; herringbone and picture-frame layouts push past 20%. Curved rims and multiple level changes add more. The calculator's waste dropdown encodes these presets (5% for simple cuts, 8% for fence pickets, 10% standard, 15% diagonal, 20% hardwood), so pick the one that matches your layout — not the one that makes the total look smaller. Skipping the waste allowance is the single most reliable way to make a second lumber run on installation day.
How much does a wood fence cost in lumber?
Fences are linear projects, so everything keys off length: a fence's lumber volume is its run in linear feet × a BF-per-linear-foot coefficient that depends on height and style. Three styles cover most residential fences, and the difference between them is mostly how many pickets each linear foot consumes.
Privacy fence vs board-on-board vs open picket
A 6-foot privacy fence — pickets on one face, two 2×4 rails, and a 4×4 post every 8 feet — carries about 2–3 BF per linear foot, midpoint 2.5. The pickets dominate: three 1×6×6 boards per linear foot is 1.5 BF before rails and posts. A board-on-board fence overlaps pickets on both faces for total privacy and wind resistance, nearly doubling picket volume to 3.5–4.5 BF per linear foot. An open 4-foot picket or ranch rail drops to roughly 1–2 BF per linear foot. Height scales pickets directly, so an 8-foot privacy fence adds about a third to the 6-foot coefficient. All of these are reference estimates — replace with local supplier quotes.
Fence cost per linear foot: a worked example
Say you are enclosing a 75 × 50-foot backyard — about 250 linear feet of run. At the privacy coefficient midpoint of 2.5 BF per foot, that is 625 BF before waste; with the 8% fence-picket waste preset, about 675 BF. At the SPF reference price of $3.50 per BF the lumber totals roughly $2,360, with a coefficient range of about $1,890–$2,830 — call it $7.50–$11.30 per linear foot of fence in framing lumber alone. Pressure-treated pickets at piece pricing usually land lower; cedar privacy pickets land higher. Posts, concrete, gates, and hardware are excluded — gates alone can add a few hundred dollars of lumber and hardware, so count them as line items.
Lumber cost for a shed, tiny house, or garage
Small buildings punch above their floor area because walls, roof, and floor scale with perimeter and span — not with footprint. A shed carries 4–6 BF per square foot of floor area: more wall per square foot than a full house, hence the higher coefficient. Detached garages land in the same band, with wide-door headers pushing toward the high end. Tiny houses on trailers sit lower when framed at 24-inch on center with lightweight spans, but finished-out tiny homes still carry 3.5–5 BF per square foot. If you can quote a footprint, the calculator's shed mode does the rest.
Worked example: a 10×12 shed
A 10 × 12 shed has 120 sq ft of footprint. At the 4–6 BF per sq ft coefficient that is 480–720 board feet, midpoint 600 BF; with a 10% waste allowance, about 660 BF. At the SPF reference price of $3.50 per BF, the framing lumber runs roughly $1,850–$2,770, midpoint near $2,310 — or about $1,160 at a $1.75 per-BF piece-pricing rate. The piece estimate is around 90 boards, and the size mix skews heavily to 2×4 stud stock with 2×6 floor joists and rafters. Add floor decking, roof sheathing, siding, and a door to the budget and the total materials for a shell typically double the framing-lumber figure.
Why lumber cost varies so much between quotes
Two builders framing identical 2,000 sq ft houses in the same month can receive framing quotes 40% apart, and both can be honest. Four variables do most of the separating: species, grade, treatment, and market timing.
Species and grade set the price per board foot
Softwoods dominate framing because they are fast-growing, light, and cheap per board foot; hardwoods cost more because they grow slower and denser. Within softwoods, SPF (spruce-pine-fir) is the commodity baseline, Douglas fir carries a premium for strength, and cedar or redwood command outdoor-durable prices several steps higher. Grade moves price too — the same SPF board in Select Structural versus No. 3 can differ by double-digit percentages per piece. The table below lists the site's 2026 reference prices per board foot and per thousand board feet.
| Species | Class | Price per BF | Price per MBF (1,000 BF) |
|---|---|---|---|
| SPF (Spruce-Pine-Fir) | softwood | $3.50 | $3,500 |
| Douglas Fir | softwood | $4.20 | $4,200 |
| Red Cedar | softwood | $5.80 | $5,800 |
| Redwood | softwood | $6.50 | $6,500 |
| White Pine | softwood | $4.00 | $4,000 |
| Red Oak | hardwood | $7.50 | $7,500 |
| White Oak | hardwood | $8.20 | $8,200 |
| Hard Maple | hardwood | $9.00 | $9,000 |
| Cherry | hardwood | $10.50 | $10,500 |
| Black Walnut | hardwood | $14.00 | $14,000 |
| Ash | hardwood | $6.80 | $6,800 |
| Poplar | hardwood | $5.50 | $5,500 |
2026 national-average reference prices from this site's board-foot price guide. Reference estimate — replace with local supplier quotes. Retail piece pricing for common framing sizes frequently lands well below these per-BF references.
Regional and market factors
Where you buy changes what you pay. The Southeast frames with Southern Yellow Pine, the West Coast with Douglas fir and hem-fir, and the North with SPF shipped down from Canadian mills — local species are always the value pick because freight is a real cost in a low-value-per-pound commodity. Mill capacity, housing starts, tariffs on Canadian softwood, wildfire seasons, and hurricane rebuilds all swing wholesale prices; the 2021 spike and 2024 trough were worth multiples of any grade premium. Treatment adds its own premium — pressure-treated stock typically prices 30–60% above untreated equivalents as a reference estimate. The practical takeaway: never carry a per-BF number across regions or seasons without re-quoting.
Cost per thousand board feet (MBF pricing)
Wholesale lumber trades per MBF — a thousand board feet. Converting is one move: price per MBF = price per BF × 1,000, so $3.50/BF is $3,500/MBF and a $600/MBF wholesale quote is $0.60/BF. The MBF column in the species table above gives you both bases at once. MBF math is also how big packages get compared: a 2,000 sq ft house at 16 MBF is a $9,600 wholesale volume at $600/MBF before yard markup, handling, and delivery — a useful check when a contractor's lumber line item feels opaque. If a quote says "$5,200 lump sum," ask for the board footage and the effective per-MBF rate; any supplier can produce both.
How to calculate lumber cost for a house, step by step
If you would rather run the numbers by hand — or verify what the calculator did — the whole method is five steps:
- Pick the coefficient. House framing carries 6–10 BF per square foot of floor area; use 8 as the midpoint unless you know the build is simple (6) or complex (10). Reference estimate — replace with local supplier quotes.
- Multiply by floor area. A 2,000 sq ft house × 8 = 16,000 BF of gross framing volume.
- Add waste. Multiply by 1.10 for standard framing (16,000 × 1.10 = 17,600 BF). Diagonal or complex layouts justify more.
- Apply a price per board foot. At the SPF reference of $3.50/BF: 17,600 × $3.50 = $61,600. At a piece-pricing rate of $1.75/BF: $30,800. The truth for your yard lies between — call and ask.
- Cross-check per square foot. Divide the total by floor area. $30,800 ÷ 2,000 = $15.40 per sq ft — inside the $12–$18 band typical of 2025–2026 framing packages. If your number lands far outside the band, re-examine the coefficient or the price basis before you commit.
The calculator above automates all five steps and adds the size-mix breakdown — but now you can audit it line by line, which is the point of showing the method.
Common mistakes when estimating lumber cost
Skipping the waste allowance. A package quoted at exactly the takeoff volume is a package that runs short. Framing wants 10%, diagonal decking 15%, and hardwood work 20% — treat waste as part of the order, not as optimism. (Reference estimate — replace with local supplier quotes.)
Pricing hardwood rates into softwood framing. The species table's hardwood prices ($7.50–$14.00 per BF) describe furniture stock. Framing a house at Red Oak rates produces a budget three times reality — pick SPF or Douglas fir for structure and reserve hardwoods for trim and flooring lines.
Ignoring engineered lumber. LVL headers, parallam beams, and I-joists are billed by linear foot, not board foot, and are excluded from every coefficient on this page. A house with long spans can carry several thousand dollars of engineered products that the BF math never sees.
Forgetting the non-lumber line items. Fasteners, hangers, and plates run roughly 10–15% of lumber cost; sheathing and structural panels often rival the framing package itself; concrete, delivery, and sales tax finish the job. Budget them explicitly so the lumber number stays honest.
Comparing against turnkey build costs. If a friend says their house "cost $200 a square foot," that is the all-in finished price — land, labor, and finishes included. Framing lumber is a small slice of it. Keep the scopes separate, or every estimate you make will look impossibly low.
Where this tool fits in your estimating workflow
This lumber cost calculator is the last link in an estimating chain. Start from the main lumber calculator to work out board feet and framing piece counts for individual walls and boards, or browse every lumber calculator on the site — unit conversion, weight, log scaling, and structural checks. Then bring the total here to price the whole project by species, and finish with written supplier quotes. Every tool is free, runs in your browser, and never stores your inputs.
FAQ
How much does lumber cost to build a 2,000 sq ft house?+
A 2,000 sq ft house needs roughly 12,000–20,000 board feet of framing lumber (the midpoint rule of 8 BF per sq ft gives about 16,000 BF). At the SPF reference price of $3.50 per board foot with a 10% waste allowance, that works out to about $46,000–$77,000. At effective piece pricing for dimension lumber — around $1.50–$2.25 per BF — the same house lands nearer $23,000–$39,000, which matches the $12–$18 per sq ft framing packages contractors commonly quote. Every figure here is a reference estimate — replace with local supplier quotes before you budget.
How much lumber do I need for a 1,000 sq ft house?+
Using the 6–10 BF per sq ft coefficient, a 1,000 sq ft house takes roughly 6,000–10,000 board feet of framing lumber, with 8,000 BF as a reasonable midpoint. That is the studs, plates, joists, rafters, and blocking — not sheathing, windows, or finishes. A tiny house around 400 sq ft scales down to roughly 2,400–4,000 BF, while a 2,500 sq ft home climbs to 15,000–25,000 BF. Run your exact floor area through the calculator above for a size-specific breakdown.
What is the lumber cost per square foot for a deck?+
Decks run 3–5 board feet per square foot of deck surface, midpoint 4. At the SPF reference price of $3.50 per BF plus 10% waste, that is about $11.50–$19.25 of framing lumber per square foot of deck, midpoint roughly $15.40. Pressure-treated pine at piece pricing usually lands lower, and premium cedar or redwood decking can push the figure higher. Diagonal decking adds a 15% waste allowance instead of 10%. All of these are reference estimates — replace with local supplier quotes.
How many board feet does a 6-foot privacy fence need per linear foot?+
A 6-foot privacy fence consumes about 2–3 board feet per linear foot — roughly 2.5 as a midpoint. That covers pickets (about three 1×6 boards per linear foot), two 2×4 rails, and a 4×4 post every 8 feet. A board-on-board fence, which overlaps pickets on both faces, climbs to about 3.5–4.5 BF per linear foot, while an open 4-foot picket or ranch rail drops to roughly 1–2 BF per linear foot. Set your fence style in the calculator and it applies the matching coefficient.
How do I calculate lumber cost from board feet?+
Multiply total board feet by the price per board foot for your species, then add your waste allowance. The full chain is: floor area × BF-per-sq-ft coefficient = board feet; board feet × 1.10 = waste-adjusted board feet; waste-adjusted board feet × price per BF = lumber cost. If a yard quotes per thousand board feet (MBF), divide the MBF price by 1,000 to get the per-BF price — $600/MBF equals $0.60 per BF. The calculator above runs this chain automatically and shows the cost range from the low to high coefficient.
Does the lumber cost include labor, fasteners, or finishes?+
No. This tool estimates the framing lumber package only — the dimensional lumber in walls, floors, roofs, decks, fences, and sheds. It excludes framing labor (commonly a separate per-square-foot or hourly charge), fasteners and hangers (budget roughly 10–15% of lumber cost as a reference estimate), sheathing and structural panels, concrete for footings and post holes, engineered lumber such as LVL headers and I-joists, and all finish materials. Those line items are priced separately by your supplier and contractor.
Why is my lumber yard quote lower than the calculator result?+
The most common reason is pricing basis. This calculator prices by the board foot using species reference prices, which is how hardwood and rough-sawn stock are quoted. Common dimension lumber — studs, 2×6 joists, fence pickets — is usually sold per piece, and piece pricing often works out to an effective $1.50–$2.25 per board foot, well below the $3.50 SPF per-BF reference. Grade, regional supply, treatment charges, and order size also move quotes. If you know your yard prices per piece, enter a custom per-BF price to model it — or simply treat the calculator output as a conservative ceiling.
How accurate is this lumber cost calculator?+
Treat it as a planning-grade estimate, accurate to roughly plus or minus 25% of a real lumber package. The BF-per-square-foot coefficients come from published framing rules of thumb (NAHB and AWC based takeoff data) and vary with layout complexity, ceiling heights, openings, and framing density. A complex two-story with tall walls can exceed the high coefficient; a simple ranch can beat the low one. The tool is built to size a budget before you call suppliers — the final number should always come from a written quote. Every figure is a reference estimate — replace with local supplier quotes.
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Last updated November 9, 2026. Board-foot-per-square-foot and BF-per-linear-foot coefficients are compiled from published NAHB and AWC framing takeoff rules of thumb and mainstream contractor estimating guides; species reference prices come from this site's 2026 board-foot price reference (see our board-foot prices guide for the full table and revision cadence). Every coefficient, cost range, and per-square-foot figure on this page is a reference estimate — replace with local supplier quotes before ordering. LumberCalculator.net does not sell lumber or publish real-time prices, and no calculator output constitutes a quotation.