Gallons to Kilograms Converter
Convert between gallons and kilograms with substance density calculations
Volume to Mass Converter
1 US gallon = 3.78541 liters
Mass = Volume × Density
Conversion Results
Conversion Formula
kg = gal × 3.78541 × 1
Mass (kg) = Volume (gal) × Conversion Factor (L/gal) × Density (kg/L)
Common Conversion Examples
Water (US Gallon)
1 gal = 3.785 kg
5 gal = 18.925 kg
10 gal = 37.85 kg
Gasoline (US Gallon)
1 gal = 2.82 kg
5 gal = 14.1 kg
10 gal = 28.2 kg
Milk (US Gallon)
1 gal = 3.9 kg
5 gal = 19.5 kg
10 gal = 39.0 kg
Honey (US Gallon)
1 gal = 5.375 kg
5 gal = 26.875 kg
10 gal = 53.75 kg
Common Substance Densities
Conversion Tips
Water has a density of ~1 kg/L at room temperature
US gallons are smaller than UK gallons (3.785L vs 4.546L)
Density varies with temperature and pressure
Use custom density for precise calculations
Understanding Gallons to Kilograms Conversion
Why Density Matters
Converting from gallons (volume) to kilograms (mass) requires knowing the density of the substance. Different materials have different densities, which is why the same volume can have very different masses.
Conversion Formula
kg = gal × 3.7854 × density
- kg: Mass in kilograms
- gal: Volume in gallons
- 3.7854: US gallon to liter conversion
- density: Substance density in kg/L
US vs UK Gallons
US Gallon
- • 3.78541 liters
- • 231 cubic inches
- • Used in United States
- • Smaller than UK gallon
UK (Imperial) Gallon
- • 4.54609 liters
- • 277.42 cubic inches
- • Used in United Kingdom
- • About 20% larger than US gallon
Practical Applications
Fuel Calculations
Calculate fuel weight for transportation, aviation, and marine applications.
Chemical Processing
Convert liquid volumes to mass for chemical manufacturing and processing.
Food Industry
Recipe scaling and ingredient calculations for commercial food production.