Board Feet To Linear Feet Calculator
Calculation Results
Calculated estimations for your inputs:
Board Feet Volume
0.00 BF
Metric Cubic Volume
0.000 m³
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The board feet to linear feet calculator helps you compute project requirements for to linear feet cases.
About Board Feet To Linear Feet Calculator
Sizing wood framing lumber requires converting nominal cross-section dimensions (inches) and linear lengths (feet) to board-foot volume measures. For a to linear feet lumber specification, board-foot volume is computed as (Thickness in. × Width in. × Length ft.) ÷ 12. Understanding actual vs nominal dimensions is critical under National Lumber Grades Authority (NLGA) guidelines.
Nominal lumber sizes represent rough-sawn dimensions before drying and planing. Sizing actual dimensions (e.g., a nominal 2x4 is actually 1.5 inches × 3.5 inches) affects framing spacing, header clearances, and load-bearing designs. Wood density and moisture content (typically restricted to 19% max for dry structural timber) determine load ratings.
A carpentry pitfall is ordering wood without a waste factor. Framing layouts require an additional 10% to 15% waste allowance to cover knots, warpage, splits, and custom cuts. Ensure lumber is stored off the ground and under cover to prevent moisture warping before framing.
Nominal lumber sizes represent rough-sawn dimensions before drying and planing. Sizing actual dimensions (e.g., a nominal 2x4 is actually 1.5 inches × 3.5 inches) affects framing spacing, header clearances, and load-bearing designs. Wood density and moisture content (typically restricted to 19% max for dry structural timber) determine load ratings.
A carpentry pitfall is ordering wood without a waste factor. Framing layouts require an additional 10% to 15% waste allowance to cover knots, warpage, splits, and custom cuts. Ensure lumber is stored off the ground and under cover to prevent moisture warping before framing.
Worked Calculations Examples
Example 1 — US Standard (Imperial):
Calculating board feet for a to linear feet piece:
• Dimensions: Nominal thickness/width × linear length.
• Board Feet = 6.67 BF.
Calculating board feet for a to linear feet piece:
• Dimensions: Nominal thickness/width × linear length.
• Board Feet = 6.67 BF.
Key Design Facts & Specifications
| Parameter | Specification Standards |
|---|---|
| Specification Unit | US Imperial / Metric |
| Default Waste Margin | 10% |
| Standard Standard Code | ASTM / ISO / IRC Compliant |
Sources & References
- ALSC (American Lumber Standard Committee) PS 20 Wood Standards:ALSC (American Lumber Standard Committee) PS 20 Wood Standards Source Link
- NHLA (National Hardwood Lumber Association) Rules for the Measurement:NHLA (National Hardwood Lumber Association) Rules for the Measurement Source Link
- ASTM D245: Standard Practice for Establishing Structural Grades Source Link
- DOC PS 20: American Softwood Lumber Standard Source Link
- WWPA (Western Wood Products Association) Lumber Grading Manual:WWPA (Western Wood Products Association) Lumber Grading Manual Source Link
- SPIB (Southern Pine Inspection Bureau) Standard Grading Rules:SPIB (Southern Pine Inspection Bureau) Standard Grading Rules Source Link
- Forest Products Laboratory: Wood Handbook Source Link
- ISO 3179: Coniferous and broadleaved softwood lumber - sizes Source Link
- NELMA (Northeastern Lumber Manufacturers Association) Grading Rules:NELMA (Northeastern Lumber Manufacturers Association) Grading Rules Source Link
- AWC National Design Specification (NDS) Supplement: Design Values Source Link