The question as stated makes no sense.
a cubic foot is a measure of volume;
a tonne is a measure of weight.
The two are related by density = weight ÷ volume
=> volume = weight ÷ density
So the number of cubic feet (an imperial measure) in 1 tonne (a metric measure) all depends upon the density of the substance weighing 1 tonne - Mercury is many times more dense than Hydrogen and so 1 tonne of Mercury will be much smaller in cubic feet than 1 tonne of Hydrogen.
One ton of granite is equivalent to approximately 36 cubic feet.
About One
There is no such thing as a "cubic ton". There is the ton as a unit of mass (1 ton = 1000 kg), and there is the cubic meter, a unit of volume.
"Cubic ton" doesn't make sense. A ton (or "metric ton", to distinguish it from the non-metric ton) has 1000 kilograms.
The number of cubic yards in a ton of rock salt can vary depending on its density, which is typically around 80 to 100 pounds per cubic foot. Generally, one ton of rock salt is approximately equivalent to 0.5 to 0.75 cubic yards. Therefore, for practical purposes, you can estimate that one ton of rock salt is around 0.6 cubic yards.
One ton is defined as 2,000 pounds. There is no such unit as the "cubic pound".
The term "cupid yard" seems to be a typographical error or confusion with "cubic yard." One ton of cement typically equals about 0.67 cubic yards, as one cubic yard of cement weighs approximately 2,400 pounds, and one ton is 2,000 pounds. Therefore, to convert tons of cement to cubic yards, you can use this relationship.
5280 maximum
It depends on the density of that heavy ton.For example if the density is 100 ton per meter cube, then one tone will have 0.01 cubic meter.
One metric ton of plain water has a volume of about 35.32 cubic feet.
A ton is a measure of weight, not volume, and as such, there IS no "cubic" ton. In US measurement, a ton of water (2000 lbs) would be about 239.65 gallons.
Here is only an answer possible, when water is assumed. 1 cubic meter weighs 1 metric ton.