How much gallons of airplane fuel weigh?

One gallon of aviation fuel weighs approximately 6 to 6.5 pounds, depending on the specific type of fuel. For example, Jet A fuel typically weighs around 6.5 pounds per gallon. Therefore, to find the total weight of airplane fuel, you can multiply the number of gallons by the weight per gallon. For instance, 100 gallons of Jet A fuel would weigh about 650 pounds.