Lumber Board Foot (BDFT), Weight & Pricing Calculator
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Lumber Board Foot (BDFT), Weight & Pricing Calculator
Calculate lumber board feet (BDFT = T × W × L / 12), linear footage, green vs kiln-dried wood weight, and timber package cost for hardwoods and dimensional framing.
| Metric Element | Value | Commercial Reference |
|---|---|---|
| Board Feet Per Piece | - | BDFT = (Thickness × Width × Length) / 12 |
| Price Equivalent Per Piece | - | Calculated cost per individual lumber board |
| Price Equivalent Per Linear Foot | - | Standard for moulding, siding, and trim comparison |
| Total Solid Wood Volume | - | Cubic feet and cubic meters of timber stock |
| Truck Haul Weight | - | Kiln-dried weight (add 25% if fresh green/pressure-treated) |
Lumber Board Foot (BDFT) & Framing Cost Calculator | Construction Engineering Calculator: Free Lumber Board Foot (BDFT) & Framing Cost Calculator tool: calculate lumber board feet (BDFT = T × W × L / 12), linear footage, green vs kiln-dried.
How to Use the Lumber Board Foot (BDFT) & Framing Cost Calculator
Select Nominal Board Dimensions
Choose lumber thickness (1", 2", 4"), width (4", 6", 8", 12"), and length in feet.
Input Quantity & Price per BDFT
Enter the total count of boards and current timber yard price per board foot ($/BDFT).
Choose Wood Species Density
Select softwoods (SPF, Cedar, Yellow Pine) or hardwoods (Oak, Maple) to estimate freight weight.
Review Total Framing Package Cost
Get exact total board footage, total price, cost per piece, and delivery truck haul weight.
Technical Trade Reference & Installation Guide
The board foot (BDFT or FBM for "Foot Board Measure") is the universal volumetric unit of measurement for commercial lumber and rough-sawn hardwood throughout North America. One board foot represents the physical volume of a nominal board 12 inches wide, 12 inches long, and 1 inch thick ($144 text{ in}^3$ or $1/12 text{ ft}^3$). The standard mathematical formula is $text{BDFT} = frac{text{Thickness (in)} times text{Width (in)} times text{Length (ft)}}{12}$.
In dimensional framing lumber, nominal dimensions are utilized for board foot calculations, even though actual dressed lumber is smaller due to kiln-drying and four-sided planing (S4S). For example, a $2 times 4$ actually measures $1.5 times 3.5$ inches, and a $2 times 6$ measures $1.5 times 5.5$ inches, but board footage is billed based on the original 2-inch and 6-inch green sawmill cuts.
Hardwood lumber is traditionally measured in "quarters" of an inch of thickness: $4/4$ equals 1 inch thick, $5/4$ equals 1-1/4 inches, $6/4$ equals 1-1/2 inches, and $8/4$ equals 2 inches. Total timber package weight is crucial for transportation logistics—dense hardwoods like White Oak (47 lbs/cu ft) weigh more than double softwoods like Western Red Cedar (23 lbs/cu ft).
Key Features & Specifications
Universal BDFT Formulation
Calculates board feet for dimensional lumber, timber framing, and 4/4 to 8/4 hardwood rough stock.
Multi-Format Pricing Conversions
Translates between price per board foot, price per piece, and price per linear foot.
Species Freight Weight Estimating
Calculates total transport weight across softwoods (SPF, Cedar, SYP) and hardwoods (Oak, Maple).
Frequently Asked Questions
A 2x4x8 board contains (2 × 4 × 8) / 12 = 5.33 board feet.
Board footage historically measures the rough green log cut before it is dried and surfaced (planed). The lost wood represents material removed during finishing, but the consumer is billed on the nominal volume.
The formula is: Board Feet = (Thickness in inches × Width in inches × Length in feet) / 12. If length is measured in inches, divide by 144 instead: (T × W × L_in) / 144.