yes 8 will do it. just divide the thickness (1") by 12 and that changes it over to inches. Example 12divided by one is .083. Takes that # and mulitply by 2,500 and you get 207.5. then divide 207.5 by 27 and you get the total # of yards whick is 7.69 Hope this helps. If you want to incress the thickness just incress the 1" to 2 or 3 etc.