This converter requires the use of Javascript enabled and capable browsers. This calculator is to determine the number of board feet for a given size of board, based on the formula (((Depth in inches x Width in inches) / 12) x Length in inches). The board must have a length in feet, inches or both. Each field must have a value in it, even if the value is "0"; "0" is the default for both and one MUST be changed. Leading zeros do not effect calculations. Each board must have a width in inches and a depth, also in inches. For instance, a 2 x 4 is (by definition only) 2 inches in depth and 4 inches in width. Those are the defaults for each since 2 x 4s are the most common lumber. It can be any length. For instance, 5 feet can be entered as 5 in the feet field or 60 in the inches field, or could be 4 in the feet field and 12 in the inches field. The quantity is for how many identical boards you wish to include in the calculation. The default is 1; if you had 5 boards, you would change that to 5. If they were all 8 foot studs, you would fill in the length as 8 feet, 0 inches, 2 depth, and 4 width. You may also use the quantity field to help indicate the total lengths of several boards by leaving it at 1 and setting the board length to the total length of all boards of the same width and depth. For instance, if you had 3, 6 foot 2 x 4s and 4, 8 foot 2 x 4s, you would enter 50 feet, 0 inches, 2 depth, 4 width and a quantity of 1. The total number of lineal feet will be displayed as one of the results. If you wish to know the total cost of the boardfootage, and you know the cost per boardfoot, enter that value in the price field (as for example 1.25 for a dollar and a quarter per board foot) and a total cost will be calculated in dollars and cents. The Reset button assigns default values to all fields and clears the totals. A value of NaN in either of the totals fields is an error message and indicates an improper entry in one of the factors. To calculate and total quantities of specific sizes of boards, use our Boardfeet Accumulator. To convert a number of boardfeet to lineal feet, use our Boardfoot To Lineal Foot Converter.