How much does 1 gallon of 100LL fuel weigh?

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Multiple Choice

How much does 1 gallon of 100LL fuel weigh?

Explanation:
Aviation gasoline like 100LL has a density a bit under 0.7 kg per liter. One US gallon is 3.785 liters, so the mass is about 2.58–2.65 kg, which is roughly 5.7–5.9 pounds. In practice, this is commonly rounded to 6 pounds per gallon. Temperature affects density a little, so the exact weight can vary with temperature, but for planning and weight-and-balance purposes, using about 6 pounds per gallon is standard.

Aviation gasoline like 100LL has a density a bit under 0.7 kg per liter. One US gallon is 3.785 liters, so the mass is about 2.58–2.65 kg, which is roughly 5.7–5.9 pounds. In practice, this is commonly rounded to 6 pounds per gallon. Temperature affects density a little, so the exact weight can vary with temperature, but for planning and weight-and-balance purposes, using about 6 pounds per gallon is standard.

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