Kilograms measure mass and gallons measure volume — converting between them depends on the liquid’s density, not a fixed ratio.
How it works
Kilograms are divided by the liquid’s density to get liters, then divided by 3.785411784 (the exact US gallon definition) to get gallons. The default density is water’s.
What this does not include
This does not include a built-in density lookup for specific liquids — check a reliable source for the exact density of whatever liquid you’re measuring if it isn’t water.
How to use this calculator
- Enter the kilograms and the liquid’s density (defaults to water).
Frequently asked questions
How many gallons is 10 kg of water?
About 2.642 gallons, the default result of this calculator.
Is this the same as the site’s kg-to-liter calculator?
Same underlying density-based method, carried one step further to US gallons instead of stopping at liters.
Does gasoline weigh the same as water per gallon?
No — gasoline is less dense than water (roughly 0.74 kg/L), so a given mass of gasoline takes up more volume than the same mass of water.
