Gallons to Pounds

What is the Gallons to Pounds Converter?

The Gallons to Pounds Converter is a free online tool that converts volume in gallons to weight in pounds based on the density of the selected substance. Since gallons measure volume and pounds measure weight, the conversion depends entirely on what substance you are measuring. Water, milk, gasoline, honey, and other liquids all have different densities, meaning a gallon of each weighs a different amount.

This tool supports both US gallons and provides a comprehensive list of common substances with pre-loaded density values. You can also input custom densities for any liquid not in the list.

How to Use This Converter

1. Select direction: Choose "Gallons to Pounds" or "Pounds to Gallons".
2. Choose a substance: Select from water, milk, gasoline, diesel, honey, and more.
3. Custom density: Select "Custom Substance" to enter your own density value in lb/gal.
4. Enter the value: Type the volume in gallons or weight in pounds.
5. View the result: See the converted value instantly along with calculation details.

Conversion Formula

The conversion between gallons and pounds uses the fundamental density formula:

Mass (pounds) = Density (lb/gal) x Volume (gallons)

For example, 1 gallon of water at room temperature (75°F) has a density of 8.345 lb/gal, so it weighs 8.345 pounds. The same volume of honey weighs 11.85 pounds because honey is denser.

Density Reference Table

For other substances, use our Gallons to Tons Converter for large-scale weight conversions, or check the Volume Converter for general volume unit conversions.