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How Long Will A 500 Gallon Propane Tank Run A Generator?

A propane tank’s 500-gallon capacity will last for 52 days of continuous usage and one year of frequent usage.

The important thing to note here is that this is an estimate and shoulder to be considered a hard and fast rule that500-gallon propane tank will last for the described duration.

It all boils down to how much propane your generator burns per day, which means how much load the generator affords and how long you keep using the generator in a day.

How Long Will A 500 Gallon Propane Tank Run A Generator

That is an important, BTU calculation for those constantly needing a generator due to weather situations or load-shedding.

So, How Long Will A 500 Gallon Propane Tank For A Generator? Let’s figure that out…

How Long Will A 500-Gallon Propane Tank Run A Generator

There are two ways to help you calculate the exact time for how long the 500-gallon propane tank will last: heating demand and house size.

Heating Demand:

Heating demand is the most important metric you should calculate to figure out exactly how much propane you will burn just to produce heat in your home in winter.

You can consider heating demand as the energy used in your home, and calculating it with basic math will solve the problem.

A propane gallon can deliver 91,500 BTUs (Units of energy)of healing energy, and here we are talking about 500 gallons, so we will multiply the amount of energy one gallon can produce by the total number of gallons we have to get the total energy a 500-gallon will produce to figure out the number of days a 500-gallon propane tank will last.

Amount of Energy = 500 Gallons x 91,500 BTU = 45,750,000

How much propane does the generator use?

So now we have the total amount of energy that the 500-gallon will be used to produce, which is around 46 Million BTUs of heating energy.

Now, figure out the energy units you consume in your home per DnD.

According to an estimate, an average home consumes around 6,000 BUT energy in an hour per day, and a big house can finish 50,000 BTUs in an hour per day.

Now, support you are calculating this for winter, then you need to figure out the total number of hours, which will tell you the duration you will get with a 500-gallon tank.

Support: You live in a home that can consume around 10,000 BTUs of heat energy in a day, and now the math is simple.

Time duration for 500-gallon tank to last = 45,750,000 BTU / 10,000 BTU/h = 4,575 hours

Four thousand five hundred seventy-five hours equals 191 days, and now you can figure out the months as well.

So, depending on the heating demand, the value of the energy consumption will be changed, and the entire formula will also change which means the control of how much propane burns in a day or how long the entir500-gallon tank is going to last depends on you and is totally in your possession.

House Size:

Now, depending upon the house size, you can figure out the exact value for how much heating power you will consume in your house and finally help sell you with figuring out how long the 500-gallon tank will last long for.

According to an estimate, the average value for producing heat foursquare sq ft area is 0.341, and one gallon of propane is equal to 4.25, which means a square foot is going to consume 1poundsoof and propane.

Now, it will be much easier for you to figure out how long a 500-gallon propane tank last.

If you live in the United States, you must be aware that in the US, the homes are calculated according to the square feet, and according to that, we will take an example a 1,500 sq ft home.

We will determine how much it will burn in how many days if we have a 500-gallon propane tank.

Assume that you will use the 500-gallon tank for six months of winter to keep the home warm, and each sq ft of your home is consuming 1 pound of propane for six months.

Amount of Propane that will be used in 6 months = 1,500 x 0.341 gallons/sq ft = 511 Gallons

So round, about 500 gallons are enough to get heating energy for as long as six months.

So, that is how you calculate how long the 500 gallons of propane tank will last. You might be thinking that this calculation was based on the heating energy; what if there are other uses of the generators like drills, machines, or other heavy equipment that someone can use?

We did the calculation because we were just meant to provide a rough idea about how long the 500-gallon tank is—Going to last.

Now, depending on your usage, you can find the mathematical values and measurements according to your needs and apply the formulas to figure out the use of the whole tank.


That was all about how long a 500-gallon tank will last. I did my best to provide accurate information to help you figure out how many things you can run on your generator for how long when you have a tank full of propane equal to 500 gallons. If you also have the same requirement, but your energy consumption is higher or lower, and your home size is bigger or smaller than what we have mentioned, just change the value. The formula will quickly bring you the number of days your 500-gallon propane tank will last.

See More:

What Will A 10000-Watt Generator Run
What Will A 3500-Watt Generator Run

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About the author

Anthony Miller

Hello Guys! I am Anthony Miller, a high dynamo, communicative author, and editor of the Renewable Cop, always providing amazing, engaging, informative, unique, highly researched, and verified content based on all sorts of generators. Read more.

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