Did you know if you go to google.com and type in the search field.
"1.2 gallons in liters" Googles says:
1.2 US gallons = 4.54249414 liters
I think google should be a requirement for noobs, not knowing one system or the other. The basic chemistry involved his here not beyond a middle or high school level anywhere and takes more common sense than anything. Figure it out. If you cant, order the measuring tools from the interwebs.
All illegal narcotics are medicinal. Boredom is a disease worse than cancer. Drugs cure it, with little or no side effects if used as directed - Doug Stanhope.
Rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add 'within the limits of the law' because law is often but the tyrant's will, and always so when it violates the rights of the individual. - Thomas Jefferson