That depends on the type material you are referring to. Also, these are two different types of measurements. Gallons is a measure of volume but the other is weight or mass. Please edit your question to include more context or details.
About 250.5 pounds for 30 US gallons.
417.5 pounds for 50 US gallons.
3,000 gallons of water weigh almost exactly 25,000 pounds
Five gallons of paint is heavier than five gallons of water, which is heavier than five gallons of oil, so please be more specific.
One pound of steam condenses back to one pound of liquid water. Since one gallon of water weighs 8.337 pounds, simply divide the weight of the condensate by 8.337 to find out how many gallons of condensate you have.
56 ounces = 3.5 pounds
42 gallons of water is 350.7 pounds
10 US gallons is approximately 83.5 pounds
30 pounds of water is 3.593 gallons.
About 250.5 pounds for 30 US gallons.
10 gallons of water is 83.5 pounds
800 pounds of water would be 95.8 US gallons.
That depends on what substance you have 227.5 pounds of.227.5 pounds of air fills many, many gallons.227.5 pounds of water fills about 27.2 gallons.227.5 pounds of granite fills only a few gallons.
4o pounds
20 gallons of water weighs 167 pounds.
15,820 gallons of water weighs 132,097 pounds.
1.189 gallons of plain water weighs 9.92 pounds.