Wood Beam Cost Calculator
Structural wood beam pricing is generally quoted per linear foot rather than per board foot, and rates vary sharply by beam type — roughly $4-6/ft for basic dimensional lumber beams, $3-12/ft for engineered LVL, and $6-34/ft (commonly $10-16/ft) for glulam — so multiply your required beam length by the applicable per-foot rate to estimate material cost.
Quick Answer
Structural wood beam pricing is generally quoted per linear foot rather than per board foot, and rates vary sharply by beam type — roughly $4-6/ft for basic dimensional lumber beams, $3-12/ft for engineered LVL, and $6-34/ft (commonly $10-16/ft) for glulam — so multiply your required beam length by the applicable per-foot rate to estimate material cost.
Wood Beam Cost Calculator
Enter your values below for an instant result, then see the formula, worked example, and common mistakes.
Enter beam length, type, and quantity, then calculate.
How to Use This Calculator
This is the clear span or total length the beam needs to cover, in feet — get this from your framing plan or by measuring the opening the beam will support.
Dimensional lumber (solid-sawn, often doubled or tripled 2x stock) is the least expensive option for shorter spans. LVL (Laminated Veneer Lumber) offers more strength and consistency for a moderate premium. Glulam (Glued Laminated Timber) is generally the strongest and most dimensionally stable option, commonly used for long spans or exposed architectural beams, at the highest per-foot cost.
Multi-beam projects (e.g. a deck with several support beams) multiply the per-beam cost by how many beams are required.
This calculator estimates material cost only by default; if you have a contractor quote for labor/installation, add it to see an all-in estimated total.
Formula
Material Cost = Beam Length (ft) x Price per Linear Foot x Quantity. Unlike dimensional lumber sold by the board foot, structural beams (especially engineered LVL and glulam) are conventionally priced and quoted per linear foot, since the cross-section (width x depth) is fixed per beam size/rating rather than sold as raw board-foot volume.
Reference Table: Typical Beam Cost Ranges (Material Only, per Linear Foot)
| Beam Type | Typical Range | Notes |
|---|---|---|
| Dimensional lumber (SPF/Doug Fir, built-up 2x) | $4-6/ft (basic stud-grade can be lower) | Least expensive; limited span capability |
| LVL (Laminated Veneer Lumber) | $3-12/ft | Strong, consistent, moderate cost; common for headers and mid-length spans |
| Glulam (Glued Laminated Timber) | $6-34/ft (commonly $10-16/ft) | Highest strength-to-weight and longest spans; often used exposed/architectural |
Common Mistakes to Avoid
- Confusing per-board-foot pricing (common for raw dimensional lumber stock) with per-linear-foot pricing (the standard convention for finished structural beams) — mixing the two up leads to large cost misestimates.
- Forgetting that beam cost estimates here are material-only — installation (crane/lift rental for heavy beams, structural connectors, labor) can add substantially to total project cost, especially for glulam beams in load-bearing renovations.
- Assuming a lower per-foot beam is always cheaper overall — a smaller, cheaper beam that doesn’t meet the required span/load rating may need to be doubled up or replaced with a larger size, which can end up costing more than choosing the correctly-rated beam from the start.
- Not accounting for regional lumber market swings — lumber commodity prices fluctuate significantly over time and by region, so treat these as planning-stage estimates and get a current local supplier quote before finalizing a budget.
When the Estimate May Be Wrong
Actual beam pricing varies by species, structural grade, exact cross-section dimensions, current regional lumber market conditions, and supplier. Engineered wood products (LVL, glulam) in particular are quoted per specific size and span rating by the manufacturer/distributor, so treat these per-linear-foot ranges as planning estimates and always confirm with a current quote before purchasing, especially for load-bearing structural beams that may require an engineer’s sign-off.
FAQs
Are wood beams priced per board foot or per linear foot?
Structural beams, especially engineered products like LVL and glulam, are conventionally priced and quoted per linear foot rather than per board foot, since each beam size has a fixed cross-section and load rating.
What is the difference between LVL and glulam beams?
LVL (Laminated Veneer Lumber) is made from thin wood veneers glued in parallel layers and is commonly used for headers and mid-span beams at a moderate cost. Glulam (Glued Laminated Timber) is made from larger dimensional lumber boards glued in layers and generally offers greater strength, longer span capability, and is often chosen for exposed architectural beams, at a higher typical cost per foot.
Why are glulam beams more expensive than dimensional lumber beams?
Glulam beams undergo an engineered manufacturing process (kiln-dried lumber laminated and glued under pressure) that produces greater strength, dimensional stability, and longer allowable spans than solid-sawn dimensional lumber, which drives a higher per-foot material cost.
Does wood beam cost include installation?
No, the per-linear-foot material costs referenced here are for the beam itself only; installation (labor, temporary shoring, structural connectors, and possibly equipment rental for heavy beams) is a separate cost that should be quoted by a contractor for load-bearing work.
Sources and Methodology
Beam cost ranges sourced from current (2026) contractor-cost-guide data: HomeGuide and Angi LVL beam installation cost guides (LVL material $3-12 per linear foot), Building Renewable and industry glulam-pricing sources (glulam $6-34 per linear foot, commonly cited $10-16/ft range for standard sizes), and dimensional-lumber retail pricing guides for built-up beam cost estimates. Always confirm current pricing with a local lumberyard or supplier, since lumber commodity prices fluctuate.
