This Chart of Residential Propane Tank Sizes Will Keep Things Straight
If you’ve bought a home with propane or recently installed a residential propane system, you may wonder what size your propane tank is, or if it’s large enough for the way you use it.
These are fair questions. Not all propane tanks have their size clearly marked on the tank itself, and many homeowners inherit an existing system from the previous owner. There’s good news, though: residential propane tank sizes follow a handful of common standards. Once you know what to look for, identifying your tank becomes much easier.
Are you a curious owner, or have you started to plan a new propane installation? Get to know which tank makes the most sense for your household with the chart below.
Residential Propane Tank Size Chart
| Tank Size | Full Propane Capacity | Appearance & Dimensions | Common Uses | Typical Home Fit |
| 120 gallon (420 lb.) | 96 gallons | Short above-ground horizontal tank, 4’6″ in height and 30″ in diameter | Cooking, fireplaces, hot water heater or space heater alone | Homes using propane for a few appliances |
| 250 gallon | 200 gallons | Mid-size horizontal tank, 7’10” long and 30″ in diameter | Heating plus several propane appliances | Small to medium homes |
| 320 gallon | 256 gallons | Horizontal tank, about 10′ long and 30″ in diameter | Whole-home heating and multiple propane appliances | Medium homes with moderate to high propane use |
| 500 gallon | 400 gallons | Large horizontal or underground tank, 9′ 11″ long and 37.5″ in diameter | Whole-home heating and multiple indoor and outdoor appliances | Most full-time residential propane customers |
| 1,000 gallon | 800 gallons | Very large horizontal or underground tank, 16′ 2″ long and 41″ in diameter | Large homes, farms, shops, or high-demand properties | High fuel usage or multiple buildings |
What Tank Size Do You Need? It Depends on How You Use Propane.
The right propane tank size for residential use is not so much about the size of your house, but about the amount of propane your household uses. What are you using the propane to do? If your 3,000 square foot home only uses it for a cooktop and a dryer, you may not need as large a tank as a 1,200 square foot home that uses it for home heating.
The more ways you use the fuel, the larger the appropriate tank will typically be. A home with propane heat, a water heater, a range, a clothes dryer, and a standby generator will use considerably more fuel than a similar-sized home that’s using propane only for cooking.
For this reason, your propane supplier will ask questions about your appliances before recommending a tank.
Above Ground or Underground?
The home propane tank sizes in the chart above are available in both above-ground and underground installations.
An above-ground tank will cost less to install and provide easy access for maintenance and inspections. Still, some homeowners prefer underground tanks because they hide the equipment from view and preserve landscaping.
To choose between above and underground styles, consider your home’s property layout and your priorities as far as aesthetics and personal preference.
Can You Tell Your Tank Size by Looking at It?
Sometimes.
A 120-gallon tank is noticeably smaller than a 500-gallon tank, while a 1,000-gallon tank is significantly longer and larger than either. Still, if you don’t see different propane tanks every day, you may not be positive which category your tank falls into on the chart.
If you’re unsure, look for:
- The manufacturer’s data plate
- Identification labels
- Documentation from the previous homeowner
- Your propane supplier’s service records
A local propane company can also help identify an existing tank during a site visit.
Bigger Isn’t Always Better!
It’s true that larger tanks require fewer deliveries — after all, they hold more fuel. Smaller tanks cost less to install, though, and may work just as well when propane serves only one or two appliances.
Just match your storage capacity to your home’s fuel demand with advice from your supplier, so your propane deliveries stay convenient throughout the year.
Should you need to replace an existing system or install a propane system for the first time, ask your propane supplier for recommendations. We’ll help you find the tank that best fits your property and the way you plan to use propane.
FAQs
The most common residential propane tank sizes are 120-gallon, 250-gallon, 320-gallon, and 500-gallon tanks. Smaller 100-pound cylinders are also used for limited residential applications.
Check the manufacturer’s data plate or identification label on the tank. If you’re still unsure, your propane supplier can usually identify the size during a service visit.
Many homes that use propane for whole-home heating have a 500-gallon tank. Homes with fewer propane appliances may only need a 120- or 250-gallon tank.
Yes. Homeowners often install a larger tank after adding propane appliances or increasing their annual fuel usage.
Yes. Underground installations are commonly available in 500-gallon and 1,000-gallon sizes, along with some smaller options depending on the application.
Yes. Larger tanks store more propane, allowing longer periods between deliveries under similar usage conditions.
Both options are common. Leasing reduces the upfront investment, while purchasing gives homeowners ownership of the equipment. Your propane supplier can explain the advantages of each.
Yes. A properly sized propane tank can fuel your home’s heating system along with water heaters, ranges, fireplaces, clothes dryers, generators, and other propane appliances.
