How many cinder blocks per foot does it take to build a 7 high fence?

To determine how many cinder blocks are needed per foot for a 7-foot high fence, you first need to know the height of a standard cinder block, which is typically 8 inches. Since 7 feet equals 84 inches, you would require 84 inches / 8 inches per block = 10.5 blocks high. Therefore, you would need 11 cinder blocks per foot to achieve the desired height, rounding up to ensure full coverage.