Convert your density to lb/yd 3. 85 lb/ft 3 = 2295 lb/yd 3 (1 pound per cubic foot equals 27 pounds per cubic yard) If you're in the US, divide 2295 by 2000 (there are 2000lb in a US ton). If you're in the UK, divide by 2200 (there are lb in a metric tonne) You now have your answer in tons per cubic yard ( US tons or metric tonnes) If you have any problems using this cubic ...