That depends on the type material you are referring to. Also, these are two different types of measurements. One is volume the other is weight or mass. Please edit your question to include more context or details.
Gallons are regions in space. Pounds are forces. Neither can be converted
into the other. Nobody has ever asked you how many gallons you weigh,
and nobody ever will.
5 Gallons of Jet A is 30 pounds
42 gallons of water is 350.7 pounds
convert 20,000 gallons to pounds
800 pounds of water would be 95.8 US gallons.
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
20 gallons of water weighs 167 pounds.
Imperial gallons can't be converted to pounds. Imperial gallons measure volume, while pounds measure mass.
50 gallons of plain water weighs about 417 pounds.
Pounds can't be converted to gallons. Pounds measure mass, while gallons measure volume.