Convert Board Foot to Cubic Foot (Lumber)
Live bidirectional calculator for Board Feet (FBM) and Cubic Feet (Lumber) (ft³) with verified formula and conversion charts.
Lumber Volume9 units
How the Calculation Works (Linear Scaling)
Since 1 Cubic Foot (Lumber) = 12 Board Feet, divide the value in Board Feet by 12.
Board Foot to Cubic Foot (Lumber) Conversion Table
Precomputed values for quick reference and printing.
| Board Foot | Cubic Foot (Lumber) |
|---|---|
| 1 FBM | 0.0833 ft³ |
| 2 FBM | 0.1667 ft³ |
| 3 FBM | 0.25 ft³ |
| 4 FBM | 0.3333 ft³ |
| 5 FBM | 0.4167 ft³ |
| 6 FBM | 0.5 ft³ |
| 7 FBM | 0.5833 ft³ |
| 8 FBM | 0.6667 ft³ |
| 9 FBM | 0.75 ft³ |
| 10 FBM | 0.8333 ft³ |
| 15 FBM | 1.25 ft³ |
| 20 FBM | 1.6667 ft³ |
| 25 FBM | 2.0833 ft³ |
| 30 FBM | 2.5 ft³ |
| 40 FBM | 3.3333 ft³ |
| 50 FBM | 4.1667 ft³ |
| 75 FBM | 6.25 ft³ |
| 100 FBM | 8.3333 ft³ |
| Cubic Foot (Lumber) | Board Foot |
|---|---|
| 1 ft³ | 12 FBM |
| 2 ft³ | 24 FBM |
| 3 ft³ | 36 FBM |
| 4 ft³ | 48 FBM |
| 5 ft³ | 60 FBM |
| 6 ft³ | 72 FBM |
| 7 ft³ | 84 FBM |
| 8 ft³ | 96 FBM |
| 9 ft³ | 108 FBM |
| 10 ft³ | 120 FBM |
| 15 ft³ | 180 FBM |
| 20 ft³ | 240 FBM |
| 25 ft³ | 300 FBM |
| 30 ft³ | 360 FBM |
| 40 ft³ | 480 FBM |
| 50 ft³ | 600 FBM |
| 75 ft³ | 900 FBM |
| 100 ft³ | 1200 FBM |
About Board Foot (FBM)
A specialized unit of lumber volume in the United States and Canada, defined as the nominal volume of a one-foot length of a board one foot wide and one inch thick (1 in × 12 in × 12 in = 144 in³ ≈ 0.00235974 m³).
History: Developed in early North American sawmills to measure commercial rough-sawn lumber volume before planing and dressing.
Common Uses: Commercial lumber pricing, rough hardwood sales, architectural framing lumber takeoffs.
About Cubic Foot (Lumber) (ft³)
An imperial/customary unit of volume equal to a cube with one-foot edges (exactly 0.028316846592 m³). In forestry, represents the baseline unit for cords and cunits.
History: Traditional forestry unit used in British Commonwealth and North American timber cruise estimates.
Common Uses: Timber inventory cruising, log volume calculations under Smalian’s formula, bulk mulch and bark deliveries.
❓ Frequently Asked Questions
How many Cubic Feet (Lumber) are in 1 Board Foot?
There are exactly 0.083333 Cubic Feet (Lumber) in 1 Board Foot (1 FBM = 0.083333 ft³).
What is the formula to convert Board Foot to Cubic Foot (Lumber)?
The formula is: Cubic Foot (Lumber) = Board Foot / 12. Since 1 Cubic Foot (Lumber) = 12 Board Feet, divide the value in Board Feet by 12.
How do I convert 1 FBM to ft³ manually?
To convert 1 FBM to ft³: apply the formula Cubic Foot (Lumber) = Board Foot / 12. Substituting gives: 1 / 12 = 0.0833 ft³.