gallons to pounds Converter
1 US gallon of water weighs about 8.34 lb, while 1 US gallon of honey weighs about 12 lb. This gallons to pounds converter switches between volume and weight using liquid density. Pick water, milk, gasoline, or honey, or enter a custom lb per gallon value when you need a different liquid.
Quick answer
lb = gallons x density (lb/US gal).
Assumes a US liquid gallon and one constant density for the whole amount. Water is about 8.34 lb per US gallon, milk is about 8.6, gasoline is about 6.1, and honey is about 12. Use a custom value when your product label or spec sheet gives you a better density.
Pounds
8.34 lb
Density used
8.34 lb/US gal
Preset
Water
Calculation
lb = gallons x density
What this tells you
- •lb = gallons x density (lb/US gal).
- •gallons = lb / density (lb/US gal).
- •A gallon does not always weigh 8.34 lb. That shortcut only fits water and similar liquids.
- •This tool uses US liquid gallons and keeps the density assumption visible.
How to Use
- 1Enter the amount you want to convert.
- 2Choose the direction, gallons to pounds or pounds to gallons.
- 3Pick a liquid preset or type a custom density in lb per US gallon.
- 4Read the converted result and confirm the density used.
How It Works
Formula
lb = gallons x density (lb/US gal)Gallons measure volume and pounds measure weight, so you need density to connect them. Multiply US gallons by the liquid's density in pounds per US gallon to get pounds. To go the other way, divide pounds by the same density to get US gallons.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Convert 5 gallons of water to pounds
Water is about 8.34 lb per US gallon, so 5 x 8.34 = 41.7 lb.
Convert 30 lb of gasoline to gallons
Gasoline is about 6.1 lb per US gallon, so 30 / 6.1 = 4.918033 gallons.
How 1 US Gallon Converts by Liquid
Typical preset densities for one US liquid gallon.
| Liquid | Density (lb/US gal) | 1 gallon in pounds |
|---|---|---|
| Water | 8.34 | 8.34 lb |
| Milk | 8.60 | 8.60 lb |
| Gasoline | 6.10 | 6.10 lb |
| Honey | 12.00 | 12.00 lb |
Preset densities are typical room-temperature estimates. Real products can vary.
Common mistakes
- Assuming every gallon weighs 8.34 lb. That works for water, not for gasoline, milk, honey, or most other liquids.
- Mixing up US gallons and imperial gallons. An imperial gallon is larger, so it weighs more for the same liquid.
- Using a generic preset when a product label or spec sheet gives you a more accurate density.