Posted: January 19, 2026
It’s easy to assume that the bigger your propane tank, the longer your supply will last—and that’s true, to a point. Propane doesn’t go bad over time, so having extra on hand is never a problem. But that doesn’t mean the largest possible tank is always the best or most practical choice.
In reality, how long your propane supply lasts depends less on the tank itself and more on how you use propane in your household. The good news? With the right tank size—and the right delivery options—you don’t have to worry about running out at all.
Many homeowners love the convenience of automatic delivery and wireless tank monitors. Both options take the guesswork out of propane management and eliminate the need to constantly check tank levels. That said, if you find yourself needing refills more often than every six weeks or so, your tank may simply be undersized for your needs. Finding the right balance is key, and that’s where professional guidance helps.
Your propane usage varies widely depending on what you’re using it for. For example, a propane cooking range only uses about 35 gallons a year. If that’s your only propane appliance, a 500-gallon tank will last 11 years! On the other hand, a propane fireplace uses about 200 gallons a year.
A traditional water heater burns about 1.5 gallons of propane a day, or about 200-300 gallons per year. A tankless water heater will use between a half a gallon and two gallons per running hour—basically, how long you are using hot water, since they heat on demand. Pool heaters use more propane, because they’re heating a lot more water.
All that taken into account, the U.S. Energy Information Administration says the average American home uses about 385 gallons of propane annually for space heating, water heating, and cooking combined.
Equipment age and efficiency also play a role. Newer, high-efficiency appliances generally use less propane than older models. Household size matters too—larger families use more hot water for showers, laundry, and dishes, which increases consumption.
Propane’s versatility really shines during power outages. Homes with propane-powered standby generators enjoy seamless backup power when storms knock out electricity. A typical 5,000-watt standby generator can run 7 to 10 days on a 500-gallon propane tank, keeping essentials (or even your entire home) running without interruption, depending on usage.
When it comes to residential propane use, propane tanks typically range from 120 gallons to 500 gallons, depending on what appliances and equipment you are running. Sure, getting a big tank means you’ll need fewer refills—and you may be able to avoid or lessen the sting from price spikes. But, a bigger tank is, well, bigger: you’ll need space to bury it. And if it’s above ground, it will really detract from the curb appeal of your home.
The experts at Superior Gas can help assess your needs and make sure you get the propane tank that makes sense for your home. Ask us about tank monitors and convenient automatic delivery service that will help you streamline by eliminating the need to call for deliveries.
Contact us for more information and to become a customer today.