Unit Conversion Calculators

Gallons to Pounds Calculator

Estimate the weight in pounds of a volume of water measured in US gallons, using water’s standard density.

Pounds —

About the Gallons to Pounds Calculator

Weight per gallon depends on the liquid's density. This calculator assumes plain water at standard density (1,000 grams per liter), which is the most common reference point for tanks, aquariums and water storage estimates.

Formula: Pounds = (Gallons × 3.785411784 × 1,000) ÷ 453.59237

One US gallon of water weighs approximately 8.3454 pounds. For other liquids, multiply the result by the liquid's specific gravity relative to water.