Use our Board Foot Calculator to quickly estimate how much lumber your project needs. Enter thickness, width, length, and quantity to calculate total board feet for one board or a full list. If you want, you can also enter a price per board foot to get an estimated total cost.

This calculator is built for customers buying boards, not for log scaling. If you need help with custom lumber, sawmilling, or kiln-dried material, Bourbon Bigfoot can help.

Board Details

Thickness (in)

4/4 = 1", 6/4 = 1.5", 8/4 = 2"

Width (in)

Decimal (8.25) or fraction (8 1/4)

Length (in)

Enter in inches (8 ft = 96)

Quantity

Price per Board Foot ($)

Leave blank if you only want board foot totals.

Results

Last Calculation

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board feet

Running Total

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board feet

Estimated Price

Estimated Total

Board feet × entered price

Hardwood is sold by the “board foot.”
A board foot is just a way to measure how much wood you’re buying. It equals a piece that’s 1″ thick × 12″ wide × 12″ long (144 cubic inches).
You’ll also see thickness written like 4/4, 6/4, 8/4, etc. That’s the rough-sawnthickness (before it’s planed smooth). For example:

4/4 = about 1″ rough (often ends up closer to 3/4″ after surfacing)
6/4 = about 1-1/2″ rough
8/4 = about 2″ rough

Thickness gets rounded up for estimating.
To keep estimates consistent, this calculator rounds thickness up to the next 1/4″. Anything thinner than 4/4 is treated as 4/4.
So if you enter 3/4″, it will calculate it as 4/4 material.
You can type measurements as decimals or fractions.
Use whichever is easier:

Decimal: 12.75
Fraction: 12 3/4
If you use fractions, just put a space between the whole number and the fraction (like 12 3/4, not 12¾).

For board length, standard hardwood rules typically round down to the nearest whole foot. That means a board measuring 8’11” would be counted as 8 feet. Some specialty grading systems may round differently, such as to the nearest half foot, but standard hardwood calculations usually follow the whole-foot method.

Understanding Board Feet

Board feet is a unit of measurement used in the lumber industry to quantify the volume of lumber. It is calculated based on the thickness, width, and length of a board, providing a standardized way to estimate lumber for various projects.

For instance, a board that measures 1 inch thick, 12 inches wide, and 10 feet long would be calculated as follows: (Thickness in inches x Width in inches x Length in feet) / 12. This results in 10 board feet, making it easier for both buyers and sellers to assess lumber quantities needed for construction or woodworking tasks.

How to Use the Board Foot Calculator

The Board Foot Calculator is designed to simplify the process of estimating lumber needs for your projects. By entering the thickness, width, length, and quantity of boards, users can quickly calculate the total board feet required without complex calculations.

To use the calculator, simply input the dimensions in the specified fields. For example, if you have multiple boards of the same size, enter the quantity to get a total estimate. This tool is particularly beneficial for hobbyists and professionals who need accurate measurements for budgeting and planning their woodworking projects.

Common Mistakes When Calculating Board Feet

Many users encounter common pitfalls when calculating board feet, which can lead to inaccurate estimates. One frequent mistake is misinterpreting the thickness of the lumber, especially when using fractions. It's essential to ensure that the thickness is entered correctly to avoid discrepancies in the total board feet.

Another common error is neglecting to convert measurements properly, such as confusing inches with feet. For instance, entering a length of 8 feet as 8 instead of 96 inches can significantly alter the calculation. Being aware of these potential mistakes can help users achieve more accurate results when using the Board Foot Calculator.

Factors Influencing Lumber Pricing

The price of lumber can vary significantly based on several factors, including species, grade, and market demand. Understanding these elements can help users make informed decisions when purchasing lumber for their projects.

For example, hardwoods like oak and maple typically command higher prices compared to softwoods like pine and fir due to their durability and aesthetic appeal. Additionally, seasonal demand fluctuations can also impact pricing, making it crucial for buyers to stay informed about current market trends to secure the best deals on lumber.