Cubic inches are a measurement of volume, or space, while feet are a measurement of length, so the question actually makes no sense.
If however you are asking how many cubic inches are in a cubic foot (which is the area contained in a cube the has a length, width and height of 1 foot), then to get the answer you multiply the length, width and height together in the unit that we want the answer in (in this case, inches). Since we know that a cubic foot has a length, width and height of 1 foot, and that 1 foot is 12 inches, we multiply 12 x 12 x 12 to get the total number of cubic inches in the cubic foot.
Therefor the answer is that there are 1,728 cubic inches in a cubic foot.
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1728 cubic inches.
1728 cubic inches.
One cubic foot is equal to 123 = 1728 cubic inches. Therefore, 6 cubic feet is equal to 6 x 1728 = 10368 cubic inches.
Because the unit is in cubic feet, not feet, you can't just divide by twelve (because there are twelve inches in a foot.) You have to cube the amount of inches in a foot, (being twelve,) to find out how many cubic inches are in one foot. Twelve cubed is 1,728, so there are 1,728 cubic inches in a foot. From there you just multiply by three, giving you 5,184.
An object that is 38 inches wide by 19 inches deep by 68 inches long is 38 inches x 19 inches x 68 inches = 49,096 cubic inches in volume.A cubic foot is a cube that is one foot on an edge. That's 12 inches on an edge, so the cubic foot is 12 inches x 12 inches x 12 inches = 1728 cubic inches in volume.Our 49,096 cubic inches divided by 1728 cubic inches = about 22.43 cubic feet.