15 cubic feet of what? - Different substances have different densities. There is no general conversion between volume and mass (or volume and weight).
Knowing that 1 cubic foot is pretty much equal to 100 pounds or 0.05 ton, 1 ton of gravel is around 20 cubic feet.
A ton is 2000 pounds weight and 32 cubic feet volume.
Although not in common use, a cubic ton is a non-standard unit of volume equal to 40 cubic feet. 2 cubic tons is therefore equal to 80 ft3, 2.9630 yd3, or 2.2653 m3.
1.953125 cubic feet
That depends on how muddy - the water to dirt ratio. A cubic foot of average mud is about 85 pounds. A ton is 2000 pounds, so that is 2000/85 = 23.5 cubic feet
Masonry sand is estimated to weigh approximately 160 pounds per cubic foot. Therefore, it would take 12.5 cubic feet of masonry sand to equal one ton.
171.88 cubic feet
One ton of plain water has a volume of about 32 cubic feet.
a cubic ton
2 3,42 cubic feet for a long ton (US) - 1016 kg.
about 6 cubic feet
about 13.3 cubic feet asphalt is about 150 lb/cubic foot