Kilograms to Gallons Custom Density Calculator
Use a user-entered density when the liquid is not listed or a product-specific density is required.
Enter a density before converting.
Kilograms to Gallons Custom Density Calculator
Use a user-entered density when the liquid is not listed or a product-specific density is required.
Enter the liquid mass in kilograms.
No default density is provided.
No default density is provided.
Enter a density before converting.
This page only becomes exact after you enter density.
Formula
US gallons = kilograms ÷ density in kg/L ÷ 3.785411784. UK gallons = kilograms ÷ density in kg/L ÷ 4.54609.
Interactive examples
Reference Table
Related liquid tools
Water is the baseline liquid for quick kilogram-to-gallon estimates and a useful reference for household measurements.
Milk density changes with fat content and processing, so whole, low-fat, and skim milk should be treated as approximate.
Paint density depends on formulation, pigment loading, and whether the product is water-based or oil-based.
Custom Density Frequently asked questions
Why is density required?
Because mass and volume are different measurements.
Where can I find density?
Use the product label, SDS, or technical sheet.
Can I convert without density?
No, not accurately.
Which density unit should I use?
Use kg/L.
What happens if density is wrong?
The gallon result is wrong by the same proportion.