Thanks, Greg, thats the figure I was looking for.
Area in square feet times 1.125 plus whatever waste you have, assuming you
standard building units (8x8x16). If you make your walls, windows, doors in
dimensions that are divisible by 8" you will minimize waste. They also make
blocks in 4", 6" and 12" so with some planning you will seldom have to cut
as long as you stay on 2" increments.