Divide kilograms by the liquid’s density, then convert litres to gallons. 100 kg of water is about 26.5 U.S. gallons.
How to use the kg to Gallons Converter
- Substance
- Custom density
- Kilograms
- Every result field is editable: type into US gallons or any other result and Kilograms plus every other field update to match.
Results update as you type, and every field accepts the units shown in its menu.
How it works
The calculator converts your weight to SI units, looks up the density of the selected substance in kg/m³ and divides. The result is then shown in US gallons and other common units. Every result field is editable, so you can work backwards too.
How to convert kilograms to US gallons
- Find the density of the substance (the menu fills it in for you).
- Convert the weight to SI units if needed.
- Divide mass by density to get volume.
- Convert the answer to US gallons.
1 kilogram of common substances in US gallons
| Substance | US gallons per 1 kg |
|---|---|
| Water (4 °C) | 0.26417205 |
| Water (20 °C) | 0.26464842 |
| Water (100 °C) | 0.27563862 |
| Seawater | 0.25772883 |
| Milk | 0.25647772 |
| Gasoline (petrol) | 0.35459336 |
| Diesel | 0.31449054 |
| Jet fuel (Jet A) | 0.3285722 |
| Kerosene | 0.32613834 |
| Crude oil (typical) | 0.30364604 |
| Ethanol | 0.33481882 |
| Propane (liquid) | 0.53584595 |
| Olive oil | 0.28934507 |
| Vegetable oil | 0.28683176 |
| Honey | 0.18603666 |
| Beer | 0.26155649 |
| Orange juice | 0.25279622 |
| Latex paint (typical) | 0.20320927 |
Densities used
| Substance | kg/m³ | g/mL | lb/US gal |
|---|---|---|---|
| Water (4 °C) | 1,000 | 1 | 8.3454045 |
| Water (20 °C) | 998.2 | 0.9982 | 8.3303827 |
| Water (100 °C) | 958.4 | 0.9584 | 7.9982356 |
| Seawater | 1,025 | 1.025 | 8.5540396 |
| Milk | 1,030 | 1.03 | 8.5957666 |
| Gasoline (petrol) | 745 | 0.745 | 6.2173263 |
| Diesel | 840 | 0.84 | 7.0101397 |
| Jet fuel (Jet A) | 804 | 0.804 | 6.7097052 |
| Kerosene | 810 | 0.81 | 6.7597776 |
| Crude oil (typical) | 870 | 0.87 | 7.2605019 |
| Ethanol | 789 | 0.789 | 6.5845241 |
| Propane (liquid) | 493 | 0.493 | 4.1142844 |
| Olive oil | 913 | 0.913 | 7.6193543 |
| Vegetable oil | 921 | 0.921 | 7.6861175 |
| Honey | 1,420 | 1.42 | 11.850474 |
| Beer | 1,010 | 1.01 | 8.4288585 |
| Orange juice | 1,045 | 1.045 | 8.7209477 |
| Latex paint (typical) | 1,300 | 1.3 | 10.849026 |
Inputs explained
| Field | What to enter |
|---|---|
| Substance | Choose one: Water (4 °C), Water (20 °C), Water (100 °C), Seawater … |
| Custom density | Units: g/cm³, kg/m³, kg/L, lb/ft³, lb/US gal |
| Kilograms | Units: kg, g, mg, µg, dag, t … |
What each result means
- US gallons = [Kilograms] ÷ [Density used]
- Litres = [Kilograms] ÷ [Density used]
- Imperial gallons = [Kilograms] ÷ [Density used]
Formula
volume = mass ÷ densityWorked example
Inputs — Substance: Water (20 °C); Custom density: 1 g/cm³; Kilograms: 100 kg.
Results — Density used = 0.9982 g/cm³; US gallons = 26.464842 US gal; Litres = 100.180325 L; Imperial gallons = 22.036591 UK gal.
Frequently asked questions
How many gallons is 100 kg of water?
About 26.5 US gal.
How many gallons is 1,000 kg of diesel?
About 315 US gal.
Why does the answer change with the ingredient?
Kilograms and US gallons measure different things (weight and volume), so the conversion depends on how dense the material is.
What if my ingredient is not listed?
Choose “Custom density” and type its density; the label or a quick weigh-and-measure test will give it.
What formula does the kg to Gallons Converter use?
volume = mass ÷ density.