Cubic feet requires Length X Width X Height. So your question does not have enough information. That's correct, but it's not hard to fix. First convert your measurements to the same unit, in this case feet. Multiply your length x width to get the 'surface area', then multiply the surface area by height to reach your 'volume' (your cubic foot measurement) As an example, let's figure this out first using a depth of 36 inches (3 feet) for the height: * 15 ft X 4 ft = 60 ft2 (or a surface area of 60 square feet) * 60 ft2 X 3 ft = 180 ft3 (or a volume (cubic area) of 180 cubic feet)
And then, (for the gardeners) we'll use a height of 8 inches (.67 feet): * 15 ft X 4 ft = 60 ft2 (or a surface area of 60 square feet) * 60 ft2 X .67 ft = 40.2 ft3 (or a volume of about 40 cubic feet)
If it's a rectangular area, then 15'x20'x4":
4" = 1/3', so:
= 15'x20'x1/3'
=5'x20' square
=100' cubic
10 ft * 15 ft * 8 ft = 1200 cubic feet
That is 4,186 cubic ft.
31,104 cubic inches = 18 cubic feet.
18 feet
18 US gallons equates to 2.4 (2.40625) cubic feet.
That is 18 cubic ft.
One cubic yard is 27 (33) cubic feet, so 18 cubic yards is 18 x 27 cubic feet.
18 x 14 x 12 = 3,024 cubic feet.
18 feet
If the given dimensions are in feet then 18*8.7*9 = 1409.4 cubic feet
18" x 8" x 15" = 2,160 cubic inches = 1.25 cubic feet
0.635664
2,700 cubic feet.
48 inches by 16 inches by 18 inches = 8 cubic feet.