BF = board feet . The term board foot is used to describe a volume that is equal to a one-inch thick square foot. ¥ (yen). Ask for a dozen two by fours eight feet long at your local sawmill, and you’ll be told that what you really want is 64 board feet of lumber. BF = w t L / 12 (1) where . Board Feet Explained. Here are some steps to follow for board foot and cost computations. Currency (optional) Manufacturers of the product use the same measurement in computing the amount of coverage of spray foam to install. We can input it into the formula as follows. For open-cell spray foam, the R-Value is around 3.6/inch. You can then compute the board footage: Board Feet = Length (inches) × Width (inches) × Thickness (inches) / 144. Calculate the number of board feet in one of the boards:$$\text{Board feet in one board} = {2.5 × 4.5 × 2 \over 12} = \text{1.875 bd. The term board foot is used to describe a volume that is equal to a one-inch thick square foot. Let's say we have a one-inch thick board that is 12 inches long by twelve inches wide. This is because the length is usually expressed in feet, the thickness, and width, in inches. Computation will require the square footage of the area that will get sprayed and how the thickness of the foam. When you are figuring up board feet, keep in mind a waste factor. One board is a measurement of volume which is equal to one square foot with a thickness of one inch. It is also possible to determine the board footage of a given board if the length is measured in feet. Once total board feet has been assessed, it is easy to find the cost: $$\text{Total cost = price per board foot × total board feet}$$. After computing, you can use the board foot calculator to check for correctness. For instance, you need 12 pieces of boards which measure 2″ x 4″ x 8′. Rough lumber measurements in width and thickness are employed when determining board feet, even in situations in which the lumber has already been sanded down. Real-time graphics. After entering the measurements, the calculator will automatically generate the Board Feet value. In general, we express the thickness of lumber in increments of a quarter-inch. ft.}$$, Multiply by the total number of boards (10) to get the total number of board feet:$$\text{Total board feet = 1.875 × 10 = 18.75 bd. First, estimate the total volume of a given board using the formula for the volume of a rectangular solid. w = nominal lumber width (in) Finally, multiply the total number of board feet by the price of each board foot to get the total cost. Then the total number of board feet is given by dividing the volume of the board by 12: $$\text{Board feet in single board} = {\text{volume of board (ft. in}^2) \over 12} $$. Input the length, width, and thickness of the boards you anticipate using in the associated fields. How many board feet are in a 2 by 4 by 8 foot long? For this example, let’s say you need 5 lumber pieces. Enter the actual board width, not the nominal value of the board. They will compute your order by board feet. Assume the pieces have a length of 8 feet, a width of 10 inches, and a thickness of 1.25-inches. If your lumber was 6' long you would need 18 feet board feet for each foot of width. How do you figure board feet in spray foam? In simple terms, a board foot is a measurement to determine the volume of hardwood lumber. Let’s calculate the board feet per piece and in total: BF/Piece = 2 x 4 x 8 / 12 = 5.33 board feet per piece Total BF = 12 (2 x 4 x8) / 12 = 64 board feet for 12 pieces. ft.) you need for a project. While both are measurements, the former is for volume, and the latter is for area. As we have previously discussed, this involves a calculation of wood volume. Softwoods are a dimensional type of lumber, meaning they come in uniform sizes. Simply multiply the width of the board in inches by the length of the board in feet and divide the output by 12: Board Feet = Length (feet) × Width (inches) × Thickness (inches) / 12. For this example, suppose that you need 10 boards that are 2.5 feet long, 4.5 inches wide, and 2 inches thick. This is why a 1"x 4" board is actually 3/4" thick and a 2"x 4" board is actually 1-1/2" thick. To calculate the thickness of the spray foam, it will depend upon the R-Value that the owner has decided on. You can also input the number of boards required. Make the calculations and see the changes. Click on the "Calculate" button to generate the results. You can convert this value to inches using the following formula: 1 board foot = 1 (12) x 1(12) x 12 = 144 inches3. $ (dollar) You may also be interested in our Square Footage Calculator, A collection of really good online calculators. € (euro) Most merchants use the board foot measurement, especially when you buy several pieces of lumber in different sizes. Let’s say the price of each board foot is $4.15. Let’s assume the cost for one board foot is $6.50.$$\text{Total cost = 6.50 × 18.75 = \$121.88}$$. ft.}$$, If you know the cost per board foot, then multiply the result by this number to get the total cost for the 10 boards. $$\text{Volume of board = length (ft) × width (in) × thickness (in)}$$. Let's say we have a board that has the following dimensions: All you need to do is substitute the numbers into the board foot formula. In contrast to a square foot, which is an area, a board foot is a volume. Therefore, we have:eval(ez_write_tag([[250,250],'calculators_io-large-leaderboard-2','ezslot_8',111,'0','0'])); You can also apply board foot computations to other products like spray foam installations. Another way of expressing this is that it’s 1/12 of a cubic foot. If the thickness and width differ, but they have the same length, then whatever the length of the board is, they will have the same number of board feet for the two sizes. This online board foot calculator can help you determine the number of board feet you need. Now multiply the result by the number of pieces to get the total number of board feet. 1 board foot = 144 in 3 = 1⁄12 ft 3 = 2360 cm 3 = 2.360 liters = 0.002360 m 3; Board feet can be calculated as. If you have more than one board, then multiply the total number of board feet in a single board by the number of boards: $$\text{Total board feet = board feet in single board × number of boards}$$. This type, however, will require a thicker coating to attain the right R-Value. Decide on how much lumber you need. You should also take into account those parts of the house which will have insulation. Re: board feet to sq ft I'm not sure if I understood your question but I'll give it my best shot. Let’s calculate the board feet per piece and in total: BF/Piece = 2 x 4 x 8 / 12 = 5.33 board feet per piece, Total BF = 12 (2 x 4 x8) / 12 = 64 board feet for 12 pieces. In foam spraying, the board foot is the industry’s standard measurement. How does the board foot calculator compute board footage in general? Simply defined, a board foot is a 1 ft piece of lumber that’s 1-inch thick. £ (pound sterling) It turns out that the answer is simpler than you think! Apply these numbers in the formula to determine the number of board feet for each piece. It has the dimensions, $$\text{1 ft (length) × 1 ft (width) × 1 in (thickness)}$$, Therefore, a single board foot has volume (in cubic inches) equal to, $$\text{12 in × 12 in × 1 in = 144 in}^3$$, Or,  equivalently, the volume in the units  ft. in² is, $$\text{1 ft × 12 in × 1 in = 12 ft. in}^2$$. Calculate the number of board feet in one of the boards:$$\text{Board feet in one board} = {2.5 × 4.5 × 2 \over 12} = \text{1.875 bd. This is a process where insulating foam gets mechanically sprayed on a surface to build up a layer of insulating material. Boards are sold in all different sizes. This will help you to generate an accurate prediction of the materials you will require and will help to avoid any wastage.