MadSci Network: Chemistry
Query:

Re: How much does a gallon of gas weigh?

Date: Thu Mar 15 10:38:27 2001
Posted By: Michael Onken, Moderator Extraordinaire
Area of science: Chemistry
ID: 984669813.Ch
Message:

According to the Material Safety Data Sheets provided by BP Amoco, each of the unleaded, fuel-grade gasolines has a specific gravity around 0.75 g/ml (grams per milliliter). In British units, this specific gravity can be expressed as lb/pt (pounds per pint), since a pint of water with a specific gravity of 1.0 weighs a pound. Since there are 8 pints to a gallon, 8 x 0.75 = 6, so:

a gallon of gasoline should weigh 6 pounds.

(Likewise, 1L of petrol weighs 750 g, for everyone outside of the US.)


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