# kg to Gallons Converter (by Liquid)

URL: https://speedycalculator.com/calculators/conversion/kg-to-gallons/
Last updated: 2026-10-25

> Convert kilograms to US gallons for water (20 °c) and 17 other substances, or enter your own density. Because kilograms measure weight and US gallons measure volume, the result depends on the substance: volume = mass ÷ density.

## Inputs

- Substance
- Custom density (g/cm³, kg/m³, kg/L, lb/ft³, lb/US gal)
- Kilograms (kg, g, mg, µg, dag, t, lb, oz, st, US ton, UK ton, gr, dr, ozt, lb t, ct, tola, amu (Da), M⊕)

## Results

- Density used
- US gallons
- Litres
- Imperial gallons

## Formula

```
volume = mass ÷ density
```

## Explanation

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

SubstanceUS gallons per 1 kgWater (4 °C)0.26417205Water (20 °C)0.26464842Water (100 °C)0.27563862Seawater0.25772883Milk0.25647772Gasoline (petrol)0.35459336Diesel0.31449054Jet fuel (Jet A)0.3285722Kerosene0.32613834Crude oil (typical)0.30364604Ethanol0.33481882Propane (liquid)0.53584595Olive oil0.28934507Vegetable oil0.28683176Honey0.18603666Beer0.26155649Orange juice0.25279622Latex paint (typical)0.20320927

### Densities used

Substancekg/m³g/mLlb/US galWater (4 °C)1,00018.3454045Water (20 °C)998.20.99828.3303827Water (100 °C)958.40.95847.9982356Seawater1,0251.0258.5540396Milk1,0301.038.5957666Gasoline (petrol)7450.7456.2173263Diesel8400.847.0101397Jet fuel (Jet A)8040.8046.7097052Kerosene8100.816.7597776Crude oil (typical)8700.877.2605019Ethanol7890.7896.5845241Propane (liquid)4930.4934.1142844Olive oil9130.9137.6193543Vegetable oil9210.9217.6861175Honey1,4201.4211.850474Beer1,0101.018.4288585Orange juice1,0451.0458.7209477Latex paint (typical)1,3001.310.849026

### Inputs explained

FieldWhat to enterSubstanceChoose one: Water (4 °C), Water (20 °C), Water (100 °C), Seawater …Custom densityUnits: g/cm³, kg/m³, kg/L, lb/ft³, lb/US galKilogramsUnits: kg, g, mg, µg, dag, t …

### What each result means

- **US gallons** = [Kilograms] ÷ [Density used]
- **Litres** = [Kilograms] ÷ [Density used]
- **Imperial gallons** = [Kilograms] ÷ [Density used]

## Worked 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.

## FAQ

**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.


## Sources

- [The Engineering ToolBox – Densities of liquids and solids](https://www.engineeringtoolbox.com/density-solids-d_1265.html)