conversions
Gallons to Pounds
Last updated: June 19, 2026
A volume-to-mass calculation utility that estimates the weight in pounds (lb) of a given volume of US gallons (gal). Because density depends on the liquid, this calculator assumes freshwater at standard temperature, noting that other substances (like oil, milk, or fuel) will have a different weight-to-volume ratio.
Convert gallons to pounds instantly. Read the conversion answers, the mathematical formula, and browse the reference lookup table.
Quick Answer
Convert liquid volume in gallons to weight in pounds. Under standard conditions, one US gallon of freshwater weighs approximately 8.345 pounds.
Gallons to Pounds
Bidirectional Gallons (gal) and Pounds (lb) Converter
Compute exact conversions between gallons (gal) and pounds (lb).
Bidirectional live updates. Enter a number in either field to convert instantly.
Answer
8.345 lb
1 gal = 8.345 lb
Gallons to Pounds Reference Table
| Gallons (gal) | Pounds (lb) | Description |
|---|---|---|
| 1 gal | 8.35 lb | One gallon of water |
| 2 gal | 16.69 lb | Two gallons of water |
| 5 gal | 41.73 lb | Office water cooler bottle |
| 10 gal | 83.45 lb | Ten gallons of water |
| 50 gal | 417.25 lb | Fifty gallons of water |
Examples
1 gal
8.345 lb
How it works
To convert gallons (gal) to pounds (lb), perform the following calculation:
Formula
lb = gal × 8.345
Method
Multiply gallons by 8.345 to estimate the equivalent weight in pounds (assuming freshwater).
Understanding Gallons to Pounds Conversions
Converting mass to volume requires knowing the density of the liquid. Under standard room temperature and pressure, one US gallon of freshwater weighs approximately 8.345 pounds. Heavier liquids like milk or seawater weigh slightly more, while lighter liquids like gasoline or alcohol weigh significantly less.
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Frequently asked questions
Multiply the gallons value by 8.345.
Approximately 8.345 pounds (or 8.34 pounds) at standard room temperature.
No, density varies by substance. For example, a gallon of gasoline weighs around 6.1 pounds, while a gallon of heavy honey weighs about 12 pounds.
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