How much does 1 gallon of Gasoline weigh?

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Question by jim
Submitted on 8/19/2003
Related FAQ: Gasoline FAQ - Part 4 of 4
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How much does 1 gallon of Gasoline weigh?

Answer by emgtrain
Submitted on 8/24/2003
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8.66 lbs

Answer by Russ
Submitted on 8/30/2003
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When I worked in an automotive engine test lab - dynamometer tests - we often had to calculate the brake specific fuel consumption (BSFC) of the test engines. We had a chart for fuel density vs temperature for our fuels that was updated monthly. As I recall, the typical weight of gasoline at 72 degrees F was around 6.25# per gallon. As it became cooler it became more dense and thus weighed more and above this temperature it was less dense and a gallon weighed less.

Answer by Midpac
Submitted on 11/30/2003
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The weight of gasoline is critical in doing weight and balance calculations for aircraft. For aviation fuel, which is similar to automobile fuel, the weight is 6 pounds per gallon. Jet A fuel, which is closer to kerosene, is 6.84 pounds. These weights are based on averages that will vary with temperature and additives due to weather.

Answer by whitevette
Submitted on 8/3/2004
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Jim- As you can see by all the (different) answers, "Ask 10 people a simple question, and you'll get at least 7 different answers"! How did we ever get to the moon...? ...and BACK? How much does gasoline weigh? It depends on which weigh you're going! LOL

Answer by PeterT
Submitted on 9/18/2004
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We use 6.2 ppg for our weight and balance calcs. Granted, when you're dealing with 40 or 50 gallons, that .2 isn't going to make that much difference, but I feel it is better to be more accurate than less.

Answer by basler
Submitted on 12/8/2004
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my basler flight manuel says it weighs 6.7 lbs/gal.

Answer by wackatweezer
Submitted on 12/16/2004
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what is the weight of jp8+100 jet fuel per gallon?

Answer by jim
Submitted on 6/24/2005
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Water weighs about 8.3 pounds/gallon. Gasoline floats on water. Therefore, gasoline weighs less than 8.3 pounds/gallon. The two answers at 6.25 and 6 lbs/gal are the most likely correct ones. The answer that replied 8.66 cannot be right.

Answer by Deep Impact
Submitted on 7/16/2005
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1 gallon of water equals 8.33 lbs. 1 gallon of gasoline equals 5.8 to 6.5 lbs. 1 gallon of ethanol equals 6.59 lbs. Source: U.S. Dept. of Energy. Fuel From Farms: a Guide to Small Scale Ethanol Production. May 1980. Page D-3. Verified by: JT, 9/98

Answer by Walt
Submitted on 9/2/2005
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About 6 lbs

Answer by Clueless
Submitted on 9/14/2005
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Midpac, i take it you work with jets/planes? I had a a question last night at work on how much Jet A used because i load planes for a cargo company and our plane was too heavy by 5000 pounds and they just defueled it and i wondered how much they took out and what a gallon weighed.

Answer by gen leu
Submitted on 10/31/2005
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Well, which it? 6.216 pounds; 6.25 pounds; or 8.66 pounds?

Answer by Helodriver
Submitted on 12/22/2005
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MidPac is correct. For Aviation W/B. 100LL (gas) is calculated at 6lb. per U.S. gal. Jet A (Diesel can be used as a sub. Trust me on this, we do it all the time in Alaska, and Canada) is given a weight of 7lb. per gal. DANGER! DO NOT FILL YOUR CAR, OR PLANE, THEN PARK IT IN SIDE A WARM GARAGE!. THE FUEL AS IT WARMS WILL FIND A WAY OUT AND MAY CAUSE FIRE FROM ANY HEATER! The Calgary (Alberta)flying club lost more than 20 planes from this exact situation

Answer by dano
Submitted on 1/14/2006
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Gasoline is so thin that if you dropped a piece of paper into a tank, it would sink to the bottom. The most expert diver with fins is not able to swim in gassoline since it is like swimming in air. Gasoline is lighter than water

Answer by Ralph
Submitted on 4/17/2006
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6.25 lbs per gallon is correct enough for most calculations. H2o is 8.34 lbs per gallon, making 8.66, as suggested earlier, a physical impossibility, unless water can float on gasoline, which it cannot.

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Answer by Bigcat
Submitted on 2/9/2006
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The weight of gasoline is dependent on the temperature, as mentioned above, but it also depends on how much alcohol has been added. Today, that's sometimes a lot. So we come up with 1 gallon of water equals 8.33 lbs. 1 gallon of gasoline equals 5.8 to 6.5 lbs. 1 gallon of ethanol equals 6.59 lbs.

Answer by Hooch
Submitted on 4/21/2006
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Automotive gasoline has a density of about 737.22 kilograms per cubic meter at 60 degrees F. Doing conversions yields 6.152 lbs per US gallon.

Answer by a
Submitted on 5/15/2006
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hello

Answer by barnezy
Submitted on 8/15/2006
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Jet fuel weighs a total of 6.7lbs

Answer by How much does a wad of spit (no snot added) weigh ?
Submitted on 9/7/2006
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1100 pounds.... (If it's big enough)

Answer by William
Submitted on 9/21/2006
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Take the MSDS sheet and look at the physical data multily the specific gravity X the weight of water 1 Gallon (US) = 8.3452641 and you have your answer

Answer by thanepohn
Submitted on 1/3/2007
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6.1756 lb. per cubic ft at 60 F degrees

Answer by sam
Submitted on 1/3/2007
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6.1756 lb per gallon @ 60 F degrees

Answer by latecomer
Submitted on 3/16/2007
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someone said 8.66 lbs. cant be right, cause water is. 8.36 pounds, and gas is lighter than water.

Answer by cntchds
Submitted on 4/13/2007
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How much fluctuation in weight is there with a 10 degree (Fahrenheit) difference up/down? Just so I can get a grasp on how much the weight changes. Thanks.

Answer by Chris
Submitted on 6/28/2007
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6.7 Lbs is the standard and depends on fuel temperature.