how much does unleaded gas weigh per gallon
How much does a gallon of unleaded gas weigh. One gallon of unleaded gas weighs around 6 pounds. Unleaded, fuel-grade gasoline has a specific gravity around 0.75 g/ml (grams per milliliter).report this answer.ow much does a gallon of unleaded gas weigh. One gallon of unleaded gas weighs around 6 pounds. Unleaded, fuel-grade gasoline has a specific gravity around 0.75 g/ml (grams per milliliter).