Worked Example: 25 Pieces of 2" × 8" × 12' Lumber at $4.50/BF + 16-ft Wall Layout
A woodworker orders 25 boards of 8/4 (2") × 8" × 12 ft lumber at $4.50/BF and frames a 16-ft wall at 16" on-center.
- Board feet per piece = (2 × 8 × 12) ÷ 12 = 16.00 BF/piece.
- Total board feet = 16.00 × 25 = 400.00 BF → Cost = 400 × $4.50 = $1,800.00.
- Volume = 400 ÷ 12 = 33.33 ft³; at 38 lb/ft³ density, total weight = 1,267 lbs (575 kg).
Result: 400.00 Board Feet costing $1,800.00 (1,267 lbs), plus 19 framing studs for a 16-ft wall.
Construction & Home · Carpentry, Lumber & Framing
Board Foot, Lumber Weight, Wall Stud Framing & Board-and-Batten Calculator: inputs, method, and how to read the result
Compute lumber Board Feet (BF), species weight, total cost, wall framing stud count, and equal Board-and-Batten spacing.
Choose inputs for the case you are checking
The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.
- Display Currency: Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
- Nominal Board Thickness (Inches): Nominal thickness in inches (e.g., 1" for 4/4, 1.25" for 5/4, 2" for 8/4 or 2× lumber).
- Board Width (Inches): Board width in inches (nominal width for softwood or actual width for random-width hardwood).
- Board Length (Feet): Length of each board in feet (e.g., 8, 10, 12, 16 ft).
What the calculation includes
With the default values shown, Total Lumber Volume & Estimated Cost is 400 Board Feet (USD 1,800.00). The calculation follows Board Foot Volume, Wood Mass & Symmetrical Batten Layout Equations; the formula and variable definitions above show how the inputs combine.
One-input check: With the other defaults held constant, changing Nominal Board Thickness (Inches) from 2 in to 3 in changes Total Lumber Volume & Estimated Cost from 400 Board Feet (USD 1,800.00) to 600 Board Feet (USD 2,700.00). This is a comparison inside the calculator's stated model, not a prediction.
Where to use caution
- Board footage uses nominal thickness and width in accordance with National Hardwood Lumber Association (NHLA) and softwood mill conventions.
- Green (unseasoned) lumber can weigh 40%–70% more than kiln-dried lumber (12% moisture content).
Scope: North American Hardwood (NHLA) & IRC Wood Framing Standard Check the assumptions and limitations against your situation before relying on the estimate.
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