Cubic feet i have a board its 4 foot long 8 inchs width and 2 inchs thick,i need to get the formula to work this out in cubic feet.thanks for all your help. larry o shea.

I think you will be looking at about 500 gallons.
598.4 US gallon.
498.3 UK Imperial gallon.

the formula is length X width X depth
so 33 X 20 X 1/6 ( .166 FT)=109.99 cubic ft of sand (4.073 cubic yards )
( 2 inches is 2 parts of 12 inches which is a foot so 2/12 = 1/6 ft)

when I went to school a board foot a board 1 foot wide and 1 foot long 1 inch thick, a 1X6 2 foot long a 1X4 3 foot long etc. a 4X4X3 inches would be considered a board foot but with new math and metric system, I'll leave the exact formula to the calculators and smart phones (I don't own one) 20 square feet would be my answer,

That depends upon how thick the foam insulation is. That is the only way to compute from cubic feet to square feet.

To simplify, assume the foam is 1 foot wide by 1 foot thick by 51 feet long. That is 51 cubic feet of foam. If you slice the block lengthwise at 1 inch intervals, you get 12 slices, each 1 foot wide by 51 feet long by 1 inch thick. This is 51 square feet of coverage at 1 inch. You would be able to cover 51x12, or 612 square feet.

Increase the thickness of the slice to 1-1/2 inches, you only get 8 slices, or coverage for 408 square feet.

Any thicker than that, and you won't get enough coverage for 400 square feet.

Calculating the cubic feet of a space requires multiplying the area of the bottom times the average height. You get the bottom area by multiplying the length times the width. Remember, to get cubic feet, you need all your measurements in feet to start with.

Here is your formula:

VOLUME (in cubic feet) = Length (in feet) X Width (in feet) X Height (in feet)

If it's a rectangular room you're working with, it is all straightforward. If there are irregular walls, it may be necessary to divide up the room into rectangular sections and then add together their individual volumes. If the ceiling is sloped, you need to use the height that has the same ceiling area above it as below it. Good luck! Truly.

Linear feet are a measure of length (no different from feet); square feet measure area. You cannot simply convert between measures of different kinds of quantities;the connection between them will be specific to a particular problem.A practical example in which this question can arise is in buying countertops for a kitchen. Some materials are sold by the square foot; others (basically those that are extruded, so they come in standard widths) are sold by the linear foot. In order to compare the two, you need to compute the area and wall length for the countertop you want.You can't convert between the two. All you have to do is to make the appropriate measurements so you can calculate the price of each item.The terms used in the lumber industry are a bit confusing.There are two terms that I think you might be mixing up.A LINEAR FOOT is simply the length of a board. If you want to know the area or volume of the board,you need additional information. For instance, 6 linear feet of 1-by-12 has an area of 6 square feet (12 inches = 1 foot, times 6 feet), and it's 1 inch thick, so the volume is 1/2 cubic foot (6 square feet times 1/12 foot). But 6 linear feet of a 1-by-6 board would have half the area and half the volume.A BOARD FOOT is equivalent to one square foot of a 1-inch-thick board. In other words, it is a square-foot-inch (ft^2-in), or 1/12 cubic foot.Linear feet are used for the pricing of a single size such as two-by-fours. Board feet are used for larger lumber that you are more likely to want to compare directly with different size boards .To sum up, neither a linear foot nor a board foot can be converted directly to square feet. A linear foot is a linear (length) measure, and a board foot is a volume measure. You need to know your particular board to do anything more, such as find the area.an example with an" L" shaped countertop will betwo rectangles are 24 by 80 inches and 24 by 36 inches. Thus the area is: 24 * 80 + 24 * 36 = 24 * (80 + 36) = 24 * 116= 2784 sq. in.To get it in square feet, divide by 144:
2784 / 144 = 19.33 sq. ft.The linear measure of this countertop would be 60 + 80 = 140 inches = 140/12 feet = 11.67 feet

4 inches is 1/3 feet, so multiply 4 feet by 2 feet by 1/3 feet to get 2 2/3 cubic feet.

just under 18 cubic feet.
at 4 inches thick there will be 3 square feet to equal 1 cubic foot. there's .6 cubic feet in an 80 lb sac. I'd get 30 bags and be careful not to go over 4 inches deep to often.

40 cubic feet.

Formula : Volume= length x width x height 17ft x 3.5ft x .33ft(one third of a foot)=19.64 cubic feet. _IF_ there is 4 cubic feet to a bag of rock, Divide 19.64 cubic feet by 4 cubic feet = 4.908 bags of rock or 5 bags with a little left over