Kg to Gallons Converter
Why You Can't Convert Kg to Gallons Directly
Trying to convert Kilograms (Mass) directly to Gallons (Volume) is like trying to convert "Inches" to "Hours." They measure two completely different physical properties.
To bridge the gap, you need a third variable: Density.
Think about it: 1 kg of Lead takes up a tiny amount of space (small volume). 1 kg of Feathers takes up a huge trash bag (large volume). The mass is the same (1kg), but the number of gallons they occupy is vastly different.
The Formula
Our calculator uses the fundamental physics equation for density, rearranged to solve for volume.
Once we have the volume in Liters, we convert it to Gallons using standard rates:
- 1 Liter = 0.264 US Gallons
- 1 Liter = 0.219 UK Gallons
Density of Common Liquids
The "standard" liquid is Water. At 4°C, water has a density of exactly 1 kg/L. This means converting water is easy: 5 kg of water is exactly 5 Liters.
However, most other liquids differ significantly.
• Liquids with density < 1.0 (Oil, Gasoline, Alcohol) are lighter than water and will float.
• Liquids with density > 1.0 (Honey, Mercury, Glycerine) are heavier and will sink.
Reference Chart (kg to Gallons)
| 10 kg of... | Volume (Liters) | Volume (US Gallons) |
|---|---|---|
| Water | 10.0 L | 2.64 gal |
| Gasoline | 13.5 L | 3.57 gal (More Volume) |
| Diesel | 11.9 L | 3.14 gal |
| Milk | 9.7 L | 2.56 gal (Less Volume) |
| Honey | 7.0 L | 1.85 gal (Much Less Volume) |
Specific Gravity
In industry and chemistry, density is often referred to as Specific Gravity (SG). SG is simply the ratio of a substance's density compared to water.
- Water SG = 1.0
- Gasoline SG = 0.74
Since water is 1 kg/L, the SG number is usually numerically identical to the density in kg/L. If you see a bottle labeled "SG 1.26", you can enter 1.26 into the "Custom Density" field of our calculator.