20/05/2009· Best Answer: 1) Metric ton is 1000 kg. It is a unit of mass. Cubic metre is a unit of volume. 1 cubic metre of water weighs 1000 kg or 1 metric ton. 2) 1 cubic metre of sand weighs 1450 kg or metric ton taking the specific gravity of sand as (as stated in part 3 of the question).