How many 8x8x16 concrete blocks do i need to build a 60'x40'x3'foundation?

To calculate the number of 8x8x16 concrete blocks needed for a 60'x40'x3' foundation, first determine the volume of the foundation: 60 ft x 40 ft x 3 ft = 7,200 cubic feet. Each concrete block has a volume of 0.67 cubic feet (8 in x 8 in x 16 in = 0.5 ft x 0.67 ft x 1.33 ft). Dividing the total volume of the foundation by the volume of one block: 7,200 cubic feet / 0.67 cubic feet ≈ 10,746 blocks. Thus, you'll need approximately 10,746 concrete blocks.