A gallon is NOT 10 pounds of water. Rough conversions: 1.1, 2.2, 3.3 for volume (quart to L), weight (pound to kg), length (foot to m). One gallon is: 4 quart

A gallon is NOT 10 pounds of water. Rough conversions: 1.1, 2.2, 3.3 for volume (quart to L), weight (pound to kg), length (foot to m). One gallon is: 4 quarts * (1 L / 1.1 quarts) * (1 kg / L) * (2.2 pounds / kg) = 4 * 2.2 / 1.1, so a gallon is roughly 8 pounds.