Linear Feet to Board Feet Calculator

Enter the length, thickness, and width of your lumber to calculate board feet, estimated weight, volume, and material cost at common price points.

Created by Luis GonzalezLast updated: May 9, 2026

How to Use This Calculator

1
Enter Linear Feet
Input the total length of your lumber in linear feet. This is the measured length of the board.
2
Enter Thickness (in)
Input the nominal thickness of the lumber in inches (e.g., 1 for a 1x board). This is typically the first number in the lumber size.
3
Enter Width (in)
Input the nominal width of the lumber in inches (e.g., 6 for a 1x6 board). This is typically the second number in the lumber size.
4
Review Board Footage and Costs
The calculator will display the total board feet, estimated weight, volume, and cost at various price points.

Example Calculation

A carpenter is ordering 20 linear feet of 1x6 lumber for a shelving project and needs to know the total board footage and estimated cost.

Linear Feet (ft)

Thickness (in)

Width (in)

Results

10 BF

Tips

Nominal vs. Actual Dimensions

Remember that lumber dimensions are often 'nominal' (e.g., a 2x4 is actually 1.5x3.5 inches). For precise board foot calculations, always use the nominal thickness and width as these are the standard values for BF calculations, not the actual milled dimensions.

Bulk Ordering Savings

Lumber yards often offer discounts for purchasing in larger quantities of board feet. If your project requires a significant amount of material, compare prices per BF for bulk orders versus smaller quantities to optimize costs.

Understanding Board Foot Pricing

Lumber is typically priced by the board foot, with common softwood prices ranging from $2.00 to $6.00 per BF, while hardwoods can range from $5.00 to $20.00+ per BF depending on species and grade. The calculator provides estimates at different price points for comparison.

Converting Linear Feet to Board Feet for Accurate Lumber Estimates

The Linear Feet to Board Feet Calculator is an essential tool for anyone working with lumber, from carpenters and contractors to DIY enthusiasts. It quickly translates the linear measurement of a board into its volumetric equivalent in board feet (BF), which is the standard unit for buying and selling rough lumber and many hardwoods. By simply inputting the total linear feet, thickness, and width, users can instantly determine the total board footage required, along with estimated weight and material costs at various price points. This conversion is crucial for accurate material ordering, budgeting, and ensuring you purchase the correct quantity for your project.

Board Feet: The Lumber Industry Standard

Board feet serve as the universal language for measuring and pricing lumber volume in North America, particularly for hardwoods and rough-sawn softwoods. This standardized unit allows for fair and consistent pricing, ensuring that buyers pay for the actual amount of wood they receive, regardless of the board's specific dimensions. Unlike linear feet, which only account for length, board feet factor in thickness and width, providing a comprehensive volumetric measurement. Understanding and using board feet is fundamental for efficient material management, preventing over-ordering or under-ordering, and accurately comparing prices between different lumber suppliers or species.

The Volumetric Formula for Board Feet

The calculation for converting linear feet to board feet is straightforward, accounting for the three dimensions of lumber. The formula is based on a piece of wood measuring 1 foot long, 1 foot wide, and 1 inch thick.

The formula used by this calculator is:

Board Feet = (Linear Feet × Thickness in Inches × Width in Inches) / 12

For example, a board that is 12 feet long, 1 inch thick, and 6 inches wide would be calculated as (12 × 1 × 6) / 12 = 6 board feet. The division by 12 normalizes the result to the standard 12x12x1 inch volume definition of a board foot. This formula ensures that the volume is accurately reflected, regardless of the specific dimensions of the lumber.

💡 To calculate the square footage of a room for flooring, knowing the board width is key. Our Linear Feet to Square Feet Converter can help you estimate material needs with waste factors.

Calculating Board Feet for a Woodworking Project

A furniture maker needs to purchase 20 linear feet of 1x6 (one-by-six) cherry lumber for a custom table. They need to determine the total board footage to get a price quote and estimate the total weight for transport.

Here's how to calculate it using the given inputs:

Linear Feet (ft): 20
Thickness (in): 1 (for a 1x board)
Width (in): 6 (for a 1x6 board)

Applying the formula:

Board Feet = (20 Linear Feet × 1 Inch Thickness × 6 Inches Width) / 12
Board Feet = (120) / 12
Board Feet = 10 BF

The furniture maker needs 10 board feet of cherry lumber. If cherry is priced at an average of $8.00 per BF, the estimated cost would be $80.00. The estimated weight for 10 BF of cherry (which is roughly 3.5 lbs/BF) would be 35 lbs.

💡 If you're dealing with larger volumes or different units, our Barrels of Oil to Liters Converter offers a similar conversion utility for liquid volumes.

Common Board Foot Pricing and Weight Factors

When purchasing lumber, understanding the typical price ranges and weight considerations for board feet is crucial for accurate budgeting and logistics. As of 2025, common softwoods like pine or spruce typically range from $2.50 to $4.50 per board foot, while hardwoods such as oak, maple, or cherry can range from $6.00 to $12.00 per board foot, with exotic species often exceeding $20.00 per BF. These prices fluctuate based on market demand, grade, and origin.

Weight is also a significant factor, especially for large orders. The density of wood varies greatly; for example, a board foot of light pine might weigh around 2.5 pounds, while a board foot of dense oak could weigh 4 pounds or more. Estimating total weight helps in planning transportation and assessing structural loads. The calculator provides estimates at low, mid, and high price points, allowing users to quickly assess cost variations and plan accordingly.

Understanding Board Foot Formula Variants

While the standard board foot formula (L × T × W) / 12 (where L is linear feet, T is nominal thickness in inches, W is nominal width in inches) is widely accepted, slight variations or interpretations can arise, particularly in international contexts or for very specific lumber types.

One common variant is when dimensions are given in different units:

Metric Conversion: If lumber is measured in meters and millimeters, the conversion factor changes significantly. For example, a board foot is approximately 2.3597 liters or 0.0023597 cubic meters. A formula might convert all inputs to cubic meters first, then multiply by a conversion factor to get board feet.
Actual vs. Nominal: While the calculator uses nominal dimensions as standard, some buyers or sellers might use actual, dressed dimensions for very precise, custom orders. This would require adjusting the thickness and width inputs to their true measurements (e.g., 1.5 inches for a 2-inch nominal thickness), leading to a slightly lower board foot count for the same nominal size.

The calculator adheres to the most common North American standard, using nominal inches for thickness and width, as this is the prevalent practice in lumber yards for general pricing and sales. Users should always confirm with their supplier which dimension standard is being used.

Frequently Asked Questions

What is a board foot?

A board foot (BF) is a unit of lumber volume, equivalent to a piece of wood 1 foot long, 1 foot wide, and 1 inch thick. It is the standard unit of measurement for pricing and selling hardwood and some softwood lumber in North America. Understanding board feet helps accurately compare costs and quantify material needs for construction and woodworking projects.

How does board footage differ from linear feet?

Linear feet measure only the length of a piece of lumber, regardless of its thickness or width. For example, a 10-foot long 2x4 and a 10-foot long 4x8 both measure 10 linear feet. In contrast, board footage accounts for all three dimensions (length, width, and thickness), providing a true measure of volume. This is why board feet are used for pricing, as they reflect the amount of wood contained.

Why is nominal thickness and width used for board feet calculations?

Nominal dimensions are the rough-sawn sizes before the lumber is planed or milled smooth. While the actual dimensions are slightly smaller (e.g., a nominal 2x4 is actually 1.5x3.5 inches), board foot calculations traditionally use the nominal dimensions for consistency in pricing and industry standards. This historical practice simplifies calculations for buyers and sellers.

What is a typical board foot price for common lumber?

Typical board foot prices vary significantly by wood type, grade, and market conditions. As of 2025, common softwoods like pine or spruce might range from $2.50 to $4.50 per board foot. Hardwoods such as oak or maple can range from $6.00 to $12.00 per board foot, while exotic hardwoods can exceed $20.00 per board foot. These prices are highly dependent on supply and demand.