How do you convert gallons to tons?

Answer 1

You can't, unless you know what the material is. 1000 gallons of gasoline will weigh less than 1000 gallons of water, which will weigh less than 1000 gallons of Mercury. Unless you know the density of the stuff, you can't figure out how much a given volume of it will weigh.

Answer 2

There is no way to directly convert tons to gallons. Tons is a measurement of weight and gallons is a measurement of volume.