The weight of a gallon in pounds depends on the substance being measured because pounds measure weight (mass under gravity) and gallons measure volume. For water, which is the most common reference:
- One US gallon of water weighs approximately 8.34 pounds (about 3.785 liters by volume)
For other substances, the weight per gallon varies due to different densities. For example:
- Milk weighs about 8.6 pounds per gallon.
- Honey weighs about 11.85 pounds per gallon.
- Jet fuel weighs about 6.71 pounds per gallon
Thus, if you want to know how many pounds are in a gallon, you need to specify the substance. For water, the standard answer is about 8.34 pounds per US gallon.
