Professional Wood Volume & Weight Suite

Ogólny Kalkulator Objętości Drewna

Calculate board feet and cubic volume for wood.

Wood Calculator Inputs

Enter physical wood dimensions to calculate total board feet, volume, and species density weight

Thickness (inches)

Width (inches)

Length (feet)

Quantity (pieces)

Wood Species Preset (calculates dry weight)

Hardwoods

Deciduous angiosperm trees including Oak, Maple, Walnut, Cherry, Ash, and Hickory. Denser wood structure makes hardwoods ideal for fine furniture, structural flooring, and cabinetry.

Avg. Density: 35–52 lbs/cu ft • Higher Janka hardness

Softwoods

Coniferous gymnosperm species including White Pine, Southern Yellow Pine, Cedar, Douglas Fir, and Spruce. Lighter weight and easier to mill, softwoods dominate structural framing and decking.

Avg. Density: 22–36 lbs/cu ft • Excellent workability

Exotic & Specialty Woods

Imported species such as Teak, Genuine Mahogany, Rosewood, and Ipe. Prized for extreme natural rot resistance, unique figure, and distinct coloring. Typically sold at premium board foot rates.

Avg. Density: 34–68 lbs/cu ft • High rot resistance

Wood Species Density & Board Foot Weight Chart

Use this comprehensive reference table to look up average density, kiln-dried weight per board foot, and Janka hardness rating across common commercial hardwood and softwood species:

Wood Species	Classification	Dry Density (lbs/ft³)	Weight / Board Foot	Janka Hardness
Red Oak	Hardwood	45 lbs/ft³	3.75 lbs / BF	1,290 lbf
White Oak	Hardwood	48 lbs/ft³	4.00 lbs / BF	1,360 lbf
Hard Maple (Sugar Maple)	Hardwood	44 lbs/ft³	3.67 lbs / BF	1,450 lbf
Black Walnut	Hardwood	38 lbs/ft³	3.17 lbs / BF	1,010 lbf
Black Cherry	Hardwood	35 lbs/ft³	2.92 lbs / BF	950 lbf
White Ash	Hardwood	42 lbs/ft³	3.50 lbs / BF	1,320 lbf
Hickory / Pecan	Hardwood	51 lbs/ft³	4.25 lbs / BF	1,820 lbf
Yellow Birch	Hardwood	43 lbs/ft³	3.58 lbs / BF	1,260 lbf
Eastern White Pine	Softwood	25 lbs/ft³	2.08 lbs / BF	380 lbf
Southern Yellow Pine	Softwood	35 lbs/ft³	2.92 lbs / BF	690 lbf
Douglas Fir	Softwood	32 lbs/ft³	2.67 lbs / BF	660 lbf
Western Red Cedar	Softwood	23 lbs/ft³	1.92 lbs / BF	350 lbf
Teak	Exotic	40 lbs/ft³	3.33 lbs / BF	1,070 lbf
Genuine Mahogany	Exotic	34 lbs/ft³	2.83 lbs / BF	800 lbf

Mathematical Formulas for Wood Board Feet & Weight

1. Standard Imperial Board Foot Formula

When thickness and width are measured in inches, and length is in feet:

BF = (Thickness″ × Width″ × Length′) ÷ 12

When all dimensions are in inches: BF = (T″ × W″ × L″) ÷ 144

2. Board Feet to Weight Formula

Convert board feet volume into weight using dry species density:

Weight (lbs) = (Total BF ÷ 12) × Density (lbs/ft³)

One board foot represents exactly 1/12th of a cubic foot of wood volume.

3. Metric to Board Feet Conversion

For international timber measured in millimeters and meters:

m³ = (Thickness mm × Width mm × Length m) ÷ 1,000,000
BF = m³ × 423.776

Conversely, 1 Board Foot equals 0.00235974 cubic meters.

4. Lumber Cost Calculation

Calculate total cost including price per board foot and waste allowance:

Total Cost = Total BF × (1 + Waste%) × Price/BF

Example: 100 BF with 15% waste at $8.50/BF = 115 × $8.50 = $977.50.

Step-by-Step Wood Calculation Examples

Example 1: Hardwood Walnut Dining Tabletop

A woodworker plans to build an 8/4 Black Walnut table measuring 2 inches thick, 40 inches wide, and 8 feet long composed of 4 matched boards.

• Total volume: (2″ × 40″ × 8′) ÷ 12 = 53.33 Board Feet
• Weight calculation (Walnut density @ 38 lbs/ft³): (53.33 ÷ 12) × 38 = 168.88 lbs
• Cost at $12.00/BF with 15% waste: 53.33 × 1.15 = 61.33 BF × $12.00 = $735.96

Example 2: White Oak Solid Hardwood Flooring Pack

Estimating 80 pieces of 1×4 White Oak boards (0.75″ × 3.5″ actual) measuring 12 feet long for flooring:

• Per piece: (0.75″ × 3.5″ × 12′) ÷ 12 = 2.625 Board Feet
• Total bundle volume (80 pieces): 80 × 2.625 = 210.00 Board Feet
• Total weight (White Oak @ 48 lbs/ft³): (210 ÷ 12) × 48 = 840.00 lbs

Najczęściej zadawane pytania

How do I calculate board feet for rough lumber?

Use actual measured dimensions rather than nominal sizes. Rough lumber is typically sold by the quarter-inch thickness (4/4 is 1 inch, 5/4 is 1.25 inches, 8/4 is 2 inches) and measured across its actual surface width and length.

Does wood species affect board feet volume?

No. Board feet is strictly a measure of physical volume (1 BF = 144 cubic inches = 1/12 cubic foot). However, species dramatically impacts wood weight, workability, tool wear, and cost per board foot.

How does moisture content affect wood weight?

Green (freshly cut) wood contains free water in cell cavities and can weigh 2 to 3 times more than kiln-dried wood at 6-8% moisture content. Always specify whether your lumber is air-dried, kiln-dried, or green when planning freight.

What is the difference between board feet and cubic feet?

One cubic foot equals exactly 12 board feet (12″ × 12″ × 12″ = 1,728 cubic inches, divided by 144 = 12 BF). To convert board feet to cubic feet, divide total board feet by 12.

How do I convert board feet to cubic meters (m³)?

One cubic meter equals approximately 423.776 board feet. To convert cubic meters to board feet, multiply by 423.776. To convert board feet to cubic meters, multiply by 0.0023597.

How much milling waste should I account for in a project?

Industry standard practice recommends adding 15% to 20% waste allowance for standard rectangular furniture stock. For wild-grained, heavily knotted, or live-edge slab lumber, budget 25% to 30% for defects and trimming.

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