Since you haven't specified a density, I'll have to assume you mean actual feet, from humans or some other animal.

Animal bodies are mostly water, so the density is approximately 1 metric ton per m^3.

That's approximately 32 ft^3 per imperial ton.

Depends on the material. If it's air, you are going to need a lot more cubic feet than if it's gold.

Density = mass / volume

A ton of what? Not everything weighs the same you crazy knucklehead.

You cannot compare volume with weight.

A ton of .. what?