How much does water, fuel, and propane weigh?
One gallon of the following liquids weighs: • Fresh water: 8.3 lb (3.8 kg) • Gasoline: 6.1 lb (2.8 kg) • Diesel fuel: 7.3 lb (3.3 kg) • Propane: 4.2 lb (1.9 kg) If you do further research on the Internet, you will find slightly different numbers quoted for the above fluids. This is because liquid weights vary with several factors, the primary ones being their exact chemical composition and temperature. After doing our own research, we have settled on the above numbers, which represent liquids in common RV use scenarios. Our Liquid Weight Calculator gives results in pounds and kilograms for the above liquids.