How much does 500 gallons of propane cost? In most cases, homeowners equate the question *‘how much does it cost to fill a 500-gallon propane tank?’* with the question *‘how much does 500 gallons of propane cost?’*.

We all know that the price of filling a 500-gallon propane tank **depends on the price of propane** (per gallon). Most of us, however, are less aware of the *80% propane tank rule*:

Namely, you can **put at most 400 gallons of propane in a 500-gallon propane tank**. This is the 80% safety rule; you can’t fill a propane tank to its full (500 gallon) capacity because propane expands at higher temperatures and can create too much pressure on the inner walls of a 500-gallon tank.

The real question is this:

*How much does 400 gallons of propane cost?* This is the price you will have to pay to fill a 500-gallon propane tank.

In short, filling a 500-gallon propane tank costs anywhere ** from $600 to $1,600** (for $1.50/gallon to $4.50/gallon propane prices).

To help you out, we have prepared a **500-Gallon Tank Propane Cost Calculator** below (you just input the price of propane, and the calculator will determine how much filling a 500-gallon will cost). We have also prepared a **chart of how much does it cost to fill a 500-gallon tank**, given different propane prices *(from $1.5/gallon to $4.5/gallon)*.

Of course, the price of propane per gallon varies quite a bit. If you check the US Energy Informational Administration website that lists the current and historical prices of pre-tax residential propane prices per gallon, you can see that the average price of propane in 2023 is *$2.86/gallon*. You can also check how much propane costs in your specific state (be aware these are pre-tax propane prices).

Here are the average US national prices of propane in the past years:

Once you know how much does propane cost in your area, you can easily use the calculator:

## 500-Gallon Tank Propane Cost Calculator

Here is an example of how to use this propane cost calculator:

Let’s say that the propane price in your area is $2.98/gallon. You just slide the propane price slider to ‘2.98’ and you get that it will cost $1192.00 to fill a 500-gallon propane tank.

Of course, the prices of propane can differ quite a lot. You can play around with the numbers in the calculator to see how much you will pay to refill a 500-gallon tank.

For further help, you can consult the chart below. You will see the price ranges to fill a 500-gallon tank for different prices of propane:

### 500-Gallon Tank Propane Cost Chart

Price Of Propane Per Gallon ($ Per Gallon): |
Cost To Fill A 500-Gallon Propane Tank: |

$1.50 Per Gallon | $600 Per Full 500-Gallon Tank |

$1.60 Per Gallon | $640 Per Full 500-Gallon Tank |

$1.70 Per Gallon | $680 Per Full 500-Gallon Tank |

$1.80 Per Gallon | $720 Per Full 500-Gallon Tank |

$1.90 Per Gallon | $760 Per Full 500-Gallon Tank |

$2.00 Per Gallon | $800 Per Full 500-Gallon Tank |

$2.10 Per Gallon | $840 Per Full 500-Gallon Tank |

$2.20 Per Gallon | $880 Per Full 500-Gallon Tank |

$2.30 Per Gallon | $920 Per Full 500-Gallon Tank |

$2.40 Per Gallon | $960 Per Full 500-Gallon Tank |

$2.50 Per Gallon | $1000 Per Full 500-Gallon Tank |

$2.60 Per Gallon | $1040 Per Full 500-Gallon Tank |

$2.70 Per Gallon | $1080 Per Full 500-Gallon Tank |

$2.80 Per Gallon | $1120 Per Full 500-Gallon Tank |

$2.90 Per Gallon | $1160 Per Full 500-Gallon Tank |

$3.00 Per Gallon | $1200 Per Full 500-Gallon Tank |

$3.10 Per Gallon | $1240 Per Full 500-Gallon Tank |

$3.20 Per Gallon | $1280 Per Full 500-Gallon Tank |

$3.30 Per Gallon | $1320 Per Full 500-Gallon Tank |

$3.40 Per Gallon | $1360 Per Full 500-Gallon Tank |

$3.50 Per Gallon | $1400 Per Full 500-Gallon Tank |

$3.60 Per Gallon | $1440 Per Full 500-Gallon Tank |

$3.70 Per Gallon | $1480 Per Full 500-Gallon Tank |

$3.80 Per Gallon | $1520 Per Full 500-Gallon Tank |

$3.90 Per Gallon | $1560 Per Full 500-Gallon Tank |

$4.00 Per Gallon | $1600 Per Full 500-Gallon Tank |

$4.10 Per Gallon | $1640 Per Full 500-Gallon Tank |

$4.20 Per Gallon | $1680 Per Full 500-Gallon Tank |

$4.30 Per Gallon | $1720 Per Full 500-Gallon Tank |

$4.40 Per Gallon | $1760 Per Full 500-Gallon Tank |

$4.50 Per Gallon | $1800 Per Full 500-Gallon Tank |

As you can see, the higher the cost of propane per gallon, the more you will have to pay to fill a 500-gallon propane tank. This goes without saying.

Hopefully, this illustrates how you can go about calculating how much it will cost to refuel a 500-gallon propane tank. If you have any questions about your 500-gallon tank, or any other sized tank, you can use the comments below and we’ll try to help you out.