⚖️ Gallons → Kilograms Converter
Find the mass of a volume measured in gallons.
Useful for fuel management, beverage production, and chemical handling where storage volumes must be expressed as weight.
Pure water at ~4°C.
Kilograms: 37.854118 kg
Pounds: 83.454045 lb
How to Use This Calculator
Enter gallons
Type the volume stored or processed in U.S. gallons.
Choose density
Pick the fluid or enter a custom density measured in grams per cubic centimeter.
Use the mass outputs
Kilograms and pounds are ready for shipping paperwork, compliance labels, or billing.
Formula
Cubic centimeters = Gallons × 3,785.411784
Mass (grams) = Volume (cc) × Density (g/cc)
Kilograms = Grams ÷ 1,000
Pounds = Grams ÷ 453.59237
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Inventory systems often track liquids by weight for transportation and regulatory compliance. This converter bridges volumetric tank readings and the mass-based records those systems require.
Since density varies widely between products, select the preset closest to your fluid or input lab-measured values for best accuracy.
Pounds are included to support dual reporting in U.S. customary and metric units.
Frequently Asked Questions
Do I need to account for temperature?
Density changes with temperature. Use a density value measured at your operating temperature for accurate results.
Can I use Imperial gallons?
This tool expects U.S. gallons. Convert Imperial gallons to U.S. gallons before using (1 Imp gal ≈ 1.20095 US gal).
What about kilograms to gallons?
Use the gram-to-liter or grams-to-fl-oz tools to convert mass back to volume, or extend this page for inverse calculations.
Can I enter fractional gallons?
Yes. Decimal gallons are handled precisely, which is useful for chemical dosing or culinary recipes.