Compare Lumber Prices by Usable Yield, Not Just Board Foot

Purchased volume versus recoverable volume

Define usable volume before comparing prices

Purchased board footage is the billed volume under the supplier's measurement convention. Surfaced volume is the physical volume after machining. Qualifying clear-cutting yield is a grading concept. Finished-part recovery is the volume of pieces that actually meet your cut list. These are different quantities.

For this guide, 'usable board feet' means recovered finished-part volume. Keep that definition consistent between suppliers. Do not use rough clear-cutting yield for one option and finished-part volume for another.

Use a transparent formula

Cost per usable board foot = total relevant cost ÷ recovered finished-part board feet.

Relevant cost may include material, freight, milling, packaging and processing labor. Include taxes and other charges consistently when applicable. Show whether labor is paid cash expense or the value assigned to your own time. Disclose excluded tools, overhead and finishing costs.

Start with the cut list

Record finished thickness, width, length, quantity, grain orientation, appearance requirements and whether glue-ups or short lengths are acceptable. Estimate machining loss and defects using actual stock or a stated planning assumption. A general waste percentage cannot guarantee recovery. Use the cut-list optimizer and board-foot calculator.

Compare grades against the same cut list

Same project, different stock

FAS can make sense for long, wide clear parts; No. 1 Common can be economical for shorter or narrower parts. Neither choice is always cheaper once you include recoverable parts and labor. The same board can produce excellent recovery for small rails and poor recovery for a wide tabletop.

Compare species only when they meet the application

A less expensive species is not a valid saving if it fails the required durability, finish, strength or appearance specification. Species substitution may also change tool wear, machining behavior, weight and finishing labor.

Compare rough and surfaced offers fairly

Include flattening, jointing and planing for rough stock. Confirm whether surfaced stock still needs straightening or final thicknessing. Avoid counting supplier milling and in-house labor for the same task twice.

Compare actual required lengths and widths, not only the average board dimensions. A lower-priced mixed pack can be unsuitable if too few pieces yield the longest parts. See the species finder and specification checklist.

Worked volume and machining example

Worked volume example

Ten finished parts, each 3/4 inch thick × 4 inches wide × 48 inches long, contain 10 board feet: 0.75 × 4 × 4 ÷ 12 = 1 board foot per part.

Ten nominal rough blanks measured at 1 inch × 5 inches × 5 feet contain 20.83 board feet. If each blank successfully yields one specified part, finished-part recovery is approximately 48%: 10 ÷ 20.83. The difference includes the chosen trimming and machining allowances; it is not automatically a defect loss.

These dimensions are arithmetic assumptions, not a promise that all 4/4 stock arrives at one inch or that a given blank can be flattened to 3/4 inch. Verify delivered thickness and condition.

Avoid a unit mismatch

Board feet use thickness and width in inches and length in feet, divided by 12. For physical finished-part volume, use actual finished dimensions. For billed volume, follow the supplier's explicitly agreed convention. Do not silently substitute one for the other.

Do not apply allowances twice

If a recovery factor already includes thickness loss, trimming and defect removal, do not add another blanket allowance for the same losses. Explain exactly what the recovery estimate includes.

Grade yield is not project yield

What grade yield means

Under standard NHLA concepts, FAS generally requires at least 83⅓% yield in qualifying clear cuttings and No. 1 Common generally requires at least 66⅔%. Detailed board, cutting and species rules apply; use the applicable current rules for an actual purchase.

Those figures are not promised recovery percentages for your furniture or millwork. Your parts may need a different thickness, width, length, grain or appearance than the grading cuttings. Planing, saw kerf and trimming further affect finished volume.

State how you estimated project yield

A measured trial on representative boards is stronger evidence than an unexplained percentage. Record starting dimensions, defects, cut decisions, finished parts and unusable remnants. For a planning estimate, label it as an assumption and show an alternative outcome.

The NHLA yield calculator provides grading context. Use it alongside a project cutting plan, not as a guarantee that a specific order will meet your cut list.

Worked cost and sensitivity examples

Example A: lower material price

All values below are hypothetical and exclude tax, tooling and overhead consistently. Option A buys 100 board feet at $5 per board foot ($500), adds $120 freight and $180 processing labor, and recovers 55 finished-part board feet. Total relevant cost is $800. Cost per usable board foot is $800 ÷ 55 = $14.55.

Example B: higher price, different recovery

Option B buys 100 board feet at $7 per board foot ($700), adds $120 freight and $60 processing labor, and recovers 75 finished-part board feet. Total relevant cost is $880. Cost per usable board foot is $880 ÷ 75 = $11.73. Despite the higher material price, the assumed recovered volume costs less per usable board foot.

Scale to the same deliverable

For an illustrative 50-finished-board-foot requirement, proportional costs are approximately $727 for A and $587 for B. This scaling assumes fractional purchasing, proportional freight and constant recovery; real minimum orders, bundle sizes and fixed freight may invalidate it. Requote the actual order rather than treating these scaled figures as offers.

Break-even and sensitivity

At A's $14.55 usable cost, B needs more than 60.5 recovered board feet for its $880 total to be cheaper on this metric: 880 ÷ (800 ÷ 55) = 60.5. If B instead recovers only 60 board feet, it costs $14.67 per usable board foot and loses that advantage. Show realistic low, expected and high recovery scenarios before committing.

If remnants have value for future work, show that credit separately and explain how it was assigned. Do not use a speculative offcut credit to hide a higher cash outlay. Compare assumptions with the lumber price methodology.

Cost comparison mistakes to avoid

• Treating NHLA minimum clear-cutting percentages as finished-project recovery.
• Comparing different thicknesses, grades or lengths without normalizing the specification.
• Leaving freight or labor out of only one option.
• Counting both supplier milling and internal labor for an identical task.
• Applying a waste allowance twice.
• Assuming fractional quantities or proportional freight are available.
• Crediting unusable offcuts at the full purchase rate without evidence.
• Presenting illustrative prices as live quotes or verified savings.

Purchasing checklist and primary sources

Before choosing stock

• Define the same finished cut list and acceptance requirements for every option.
• Confirm the billed measurement convention and delivered dimensions.
• Record grade and machining requirements.
• State how recovered finished volume was measured or estimated.
• Itemize material, freight, milling and labor consistently.
• Show break-even yield and a lower-recovery scenario.
• Check minimum orders, fixed charges and lead times.
• Confirm the real quote before ordering.

Follow the purchasing sequence

Use the specification checklist before requesting prices and the delivery inspection guide when the material arrives.

Primary sources and methodology

• American Hardwood Export Council grading guide: explanation of NHLA grading and qualifying clear cuttings. It is explanatory material, not a replacement for the current official rules.
• USDA Wood Handbook: properties affecting processing and service performance.
• USDA Chapter 13: moisture control and dimensional change.

Reference links checked during preparation on October 1, 2026. The numerical examples were calculated from the stated hypothetical inputs; they are not workshop measurements, independent test results or current supplier prices.