Using Imperial weights and measures, one pound of Jet A-1 type fuel is equal to 0.15 gallons. So, if you multiply 6.66 pounds by 0.15, you can figure out that one gallon of Jet A-1 type fuel weighs 6.66 pounds.
Jet A-1 fuel is the most common type of jet fuel that people and businesses buy and use. It is sold by the pound instead of the gallon to make it easier to figure out how much to bring on a flight. It is important for the plane’s performance and safety to know exactly how much it weighs at any given time during flight. A pilot will find it more useful to know how many pounds a full fuel load weighs than how much space it takes up.
