A square foot does not contain cubic inches because it is a flat square; a cubic foot contains cubic inches in which case L x W x H gives you 1,728 cubic inches in a cubic foot. 12 x 12 x 12 = 1,728
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1 sq ft * 6 inches = 1 sq ft * 0.5 ft = 0.5 cubic feet.1 sq ft * 6 inches = 1 sq ft * 0.5 ft = 0.5 cubic feet.1 sq ft * 6 inches = 1 sq ft * 0.5 ft = 0.5 cubic feet.1 sq ft * 6 inches = 1 sq ft * 0.5 ft = 0.5 cubic feet.
Apples and oranges. Without knowing how thick the 450 sq. ft. area is or how thick you want it to be you can't convert to cubic yards. A cubic yard has 27 cubic feet. One square foot 3 inches thick would be 1/4 cubic feet. 4 sq. ft. 3 inches thick would be 1 cubic foot. 450 sq. ft. 3 inches thick is 112 1/2 cubic feet or just a bit over 4 cubic yards. 450 sq. ft. 4 inches thick is 150 cubic feet or 5 1/2 cubic yards.
16553 sq ft * 2 inches = 16553/9 sq yards * 2/36 yards = 16553*2/(9*36) cubic yards = 102.18 cu yards.
450 sq ft = 64,800 sq inches.
1 yard means 1 cubic yard; 4 in = 1/3 ft; 1 yd = 3 ft 1 cubic yard 3x3x3 cubic feet= (1/3 ft)(X sq ft) X = 81 sq ft