Five gallons of paint is heavier than five gallons of water, which is heavier than five gallons of oil, so please be more specific.
Five gallons of pure water weighs 41.725 pounds @8.345lbs per gallon.
Water weighs approximately 8 pounds per gallon, so 5 gallons weigh about 40 pounds.
50 gallons of plain water weighs about 417 pounds.
About 42 pounds.
Gallons is a liquid measurement and pounds are a solid measurement. A close estimate would be almost five gallons.
The answer will differ depending of the density of the object you are measuring/converting.
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