Weigh an empty container; pour a gallon of water into it. Weigh it again. Calculate the difference. That is the weight of the gallon of water.
The weight of a gallon of water is about 8.34 pounds at 17 degrees Celsius. At different temperatures, the weight will be different. This is in Imperial measurements, where an Imperial gallon is equal to 4.54609 liters.
The mass of water is with 20-30 % higher.
The weight of fresh water is largely dependent on its temperature. A US gallon of fresh water weighs about 8.328676 pounds at 70 degrees F.
not just one gallon
A gallon of water weighs 8 pounds.
I gallon (Imperial) weighs just over 10 pounds-weight.
What does "at 200" mean? Degrees Fahrenheit?
Weight of 1 US Gallon of water = approx. 8.35 lb
About 21,173.93 pounds at 8.35 lbs/gallon.
possibly... but it isn't that simple
1 US gallon of water weighs 3.79 kilograms, or 8.36 lb. 1 Imperial gallon is equal to 10 pounds of distilled water.
A gallon of water weighs about 8.34 pounds. If you have a good sized bucket with a gallon of water in it and you put a 5-pound fish in the bucket, you'll have a bucket that weighs about 13.34 pounds (plus the weight of the bucket). That's as long as the bucket doesn't overflow. The fish will (usually) be neutrally bouyant in the water, and it will be essentially weightless in that water. But its weight will add to that of the water in the bucket. No, it won't weigh 15 pounds, but it will weigh in as suggested. However, the weight of the water itself will not change.