Kilograms measure weight and gallons measure volume, so converting between them requires knowing what liquid you’re actually working with. This converter uses each liquid’s typical density to translate a weight in kilograms into US gallons and liters.

How to use this kg to gallons converter

1. Enter your weight in Kilograms (kg).
2. Pick a common Liquid for its typical density, or select Custom density and enter your own in kg per liter.
3. Read the resulting Volume in US Gallons and Liters.

What this converter does

1 kg of water fills about 0.264 US gallons, since water’s density is very close to exactly 1 kg per liter. Denser liquids fill less volume for the same weight, while lighter liquids like gasoline fill more, this converter accounts for that using each liquid’s specific density.

Why fuel and oil convert differently than water

Gasoline is noticeably less dense than water, about 0.74 kg per liter, so a given weight of gasoline fills more volume than the same weight of water would. Diesel and vegetable oil sit somewhere between water and gasoline in density. This is why fuel is bought and sold by volume (liters or gallons) at the pump, but its weight per gallon varies depending on exactly which fuel it is.

Frequently asked questions