This value will depend on the density of whatever it is that you are measuring/converting.
50 gallons of plain water weighs about 417 pounds.
42 gallons of water is 350.7 pounds
Six US gallons is 22,712.5mL
10 US gallons is approximately 83.5 pounds
10 gallons of water is 83.5 pounds
30 pounds of water is 3.593 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.
417.5 pounds for 50 US gallons.
About 334 pounds for 40 US gallons.
18 gallons of water is 150.3 pounds.