Take Wall Length x Wall Height to get Square Footage of Wall.
Multiply this area by 1.125 to get block count.
Multiply this area by 1.125 to get block count.
That is about 25% more block, I hope your not wasting that much!When I am pricing something I usually divide by .8 per sq ft for a block count , that way I have a certain amount of wastage already built in, of course our blocks in Canada are metric & are a tad smaller too