Volume - Lumber Converter
Print pageAll Equivalents Reference Table
| Unit | Equivalent Value |
|---|
Lumber and timber volumes are measured using specialized forestry and commercial wood units across logging operations, sawmill production, wholesale timber trading, building construction, and firewood supply. While international timber trade and forestry research use cubic meters (m³), North American sawmills and building suppliers measure dimensional lumber in board feet (BF or FBM), wholesale timber in thousand board feet (MBF), firewood in cords (128 cu ft), pulpwood in cunits (100 cu ft), and structural OSB/plywood panels in thousand square feet (MSF).
Our free online Volume – Lumber Converter provides instant, high-precision conversions between all commercial wood volume units:
- Board Feet to Cubic Meters: Multiply board feet by
0.0023597372(1 m³ ≈ 423.776 BF). - Board Feet to Cubic Feet: Divide board feet by
12(1 cu ft = 12 board feet). - Thousand Board Feet (MBF) to Cubic Meters: Multiply MBF by
2.3597372158(1 MBF = 1,000 BF). - Stacked Cords to Cubic Meters: Multiply cords by
3.6245563633(1 cord = 128 cu ft stacked). - Cunits (Solid Wood) to Cubic Meters: Multiply cunits by
2.8316846593(1 cunit = 100 cu ft solid).
Commercial Lumber & Timber Volume Units Master Table
The table below summarizes the exact cubic meter (m³), cubic feet (ft³), and board feet equivalents for core timber industry measurement units:
| Lumber Unit Name | Abbreviation | Exact Cubic Meters (m³) | Cubic Feet (ft³) | Board Feet (BF) | Industry Timber Definition |
|---|---|---|---|---|---|
| 1 Board Foot | BF, FBM |
0.00235974 m³ | 0.083333 ft³ | 1.0 BF |
12″ × 12″ × 1″ unplaned wood (144 cu in) |
| 1 Thousand Board Feet | MBF, mbf |
2.35973722 m³ | 83.333333 ft³ | 1,000 BF |
Standard wholesale sawn lumber trading unit |
| 1 Cubic Foot | ft³, cu ft |
0.02831685 m³ | 1.0 ft³ |
12.0 BF |
12″ × 12″ × 12″ solid volume |
| 1 Firewood Cord (Stacked) | cord |
3.62455636 m³ | 128.0 ft³ |
1,536.0 BF | 4 ft × 4 ft × 8 ft stacked logs with air gaps |
| 1 Cord (80 cu ft Solid Wood) | cord (80) |
2.26534773 m³ | 80.0 ft³ |
960.0 BF |
Net solid wood content in a cord excluding air voids |
| 1 Cord Foot | cd ft |
0.45306955 m³ | 16.0 ft³ |
192.0 BF | 1/8th of a cord (4 ft × 4 ft × 1 ft) |
| 1 Cunit (Solid Wood) | cunit |
2.83168466 m³ | 100.0 ft³ |
1,200.0 BF |
100 cu ft net solid wood volume (Pulpwood standard) |
| 1 Railroad Cross Tie | cross tie |
0.09438949 m³ | 3.333 ft³ (4.0 nominal) |
40.0 to 48.0 BF |
Standard 7″ × 9″ × 8.5′ hardwood railway tie |
| 1 Railroad Switch Tie | switch tie |
0.14866344 m³ | 5.250 ft³ (6.3 nominal) |
63.0 to 75.6 BF |
Standard 7″ × 9″ × 13.5′ railway switch tie |
| 1 Wooden Pallet (GMA) | pallet |
0.04011553 m³ | 1.416667 ft³ |
17.0 BF |
Standard 48″ × 40″ GMA shipping pallet lumber |
Step-by-Step Calculation Example
To calculate the board footage of 50 pieces of nominal 2×4 studs (8 feet long):
Board Feet per Stud = (2 × 4 × 8) ÷ 12 = 5.333 BF
50 studs × 5.333333 = 266.67 Board Feet (0.629 m³)
Thus, 50 eight-foot 2×4 studs equal approximately 266.67 Board Feet (0.267 MBF).
Thousand Square Feet (MSF) Plywood & OSB Panel Volume Table
Structural sheathings, OSB, and plywood panels are traded wholesale in MSF (Thousand Square Feet) based on panel thickness:
| Plywood / OSB Panel Thickness | MSF Panel Area (1,000 sq ft) | Exact Volume in Cubic Meters (m³) | Volume in Cubic Feet (ft³) | Equivalent Board Feet (BF) |
|---|---|---|---|---|
| 1/8-inch Panel (0.125″) | 1 MSF (31.25 4×8 sheets) | 0.294967 m³ | 10.416667 ft³ | 125.0 BF |
| 1/4-inch Panel (0.250″) | 1 MSF (31.25 4×8 sheets) | 0.589934 m³ | 20.833333 ft³ | 250.0 BF |
| 3/8-inch Panel (0.375″) | 1 MSF (31.25 4×8 sheets) | 0.884901 m³ | 31.250000 ft³ | 375.0 BF |
| 1/2-inch Panel (0.500″) | 1 MSF (31.25 4×8 sheets) | 1.179869 m³ | 41.666667 ft³ | 500.0 BF |
| 3/4-inch Panel (0.750″) | 1 MSF (31.25 4×8 sheets) | 1.769803 m³ | 62.500000 ft³ | 750.0 BF |
History & Timber Industry Standards: 19th Century Logging vs. Colonial Cord Line
The Board Foot (BF) and Log Rules
The board foot was invented during the 19th-century North American timber boom to estimate the volume of usable sawn boards that could be milled from raw round logs. Defined as 12 inches × 12 inches × 1 inch (144 cubic inches), sawmills used log rules (Scribner, Doyle, International 1/4-inch) to convert log diameters into board feet.
Colonial Firewood Cord and the Cunit
The word cord originates from colonial America, where harvested firewood stacked 4 ft high by 4 ft deep by 8 ft long was measured using a physical 16-foot line or cord. Because stacked cords include air voids between split logs, timber pulp mills invented the cunit (100 cubic feet of net solid wood volume = 2.8317 m³) in the 20th century to eliminate air gap measurement errors.
For building project volume estimates, visit our Concrete Calculator or Gravel Calculator. For surface area and floor plan calculations, check our Area Calculator or explore our Conversion Calculator.
Frequently Asked Questions (FAQ)
How do I calculate board feet for a piece of lumber?
Multiply thickness in inches by width in inches by length in feet, then divide by 12: (Thickness" × Width" × Length') ÷ 12 = Board Feet.
How many board feet are in 1 cubic meter (m³) of lumber?
There are approximately 423.776 board feet (BF) in 1 cubic meter of lumber (1 ÷ 0.002359737).
What is the difference between a stacked cord and an 80 cu ft solid cord?
A standard stacked cord measures 128 cubic feet in external dimensions (4′ × 4′ × 8′), but contains approximately 80 cubic feet of actual solid wood due to air space between stacked logs.
How many board feet are in 1 MBF?
1 MBF equals exactly 1,000 board feet (M is the Roman numeral for 1,000).