one kilo is the same as 1kg
1000
1kg
Exactly 1.
A gallon is a unit of volume, a kilogram is a unit of mass. You can only convert this for a specific substance, if you know the substance's density.
Kilograms is a measure of weight and quart is a measure of volume. You would need to know the density of the item you have. For example, a kilogram of mercury is denser than a kilogram of oxygen....