how much dirt is 1 ton?
Let me take a density of 100 pounds per cubic foot as an example. 100 lb/ft3 = 100 lb/ft3 × 33/1 ft3/yd3 = 2700 lb/yd3. Since there are 2000 pounds in a ton this is 2700.2000 = 1.35 tons per cubic yard and thus 15 cubic yards weighs 1.35 × 15 = 20.25 tons.