Weight per gallon of water adds how many pounds?

• A. 8 to 10 pounds
• B. 6 to 8 pounds
• C. 10 to 12 pounds
• D. 12 to 14 pounds

Answer: (A)

Understanding how much a gallon of water weighs is important for assessing real-world loads, pump setup, and weight handling during firefighting operations. A U.S. gallon of water weighs about 8.34 pounds at standard room temperature, so in practice we round to roughly 8 pounds per gallon, sometimes a bit more (around 8.5). Therefore, estimating about 8 to 10 pounds per gallon is a practical and common rule of thumb. That’s why 8 to 10 pounds is the best choice. The other ranges don’t fit typical water weight: 6 to 8 pounds is a bit low for most gallons, while 10 to 12 or 12 to 14 pounds overstate the weight for a standard gallon.