Quick answer: Your propane bill equals the gallons you use times your local price per gallon. At the 2026 national average of about $2.67 per gallon, a full 500-gallon tank fill (400 usable gallons after the 80% fill rule) runs around $1,070. Use the calculator below to plug in your own tank size and local price for an exact number.

Nobody likes opening a propane bill and feeling surprised. The good news is that propane pricing is simple math once you know your numbers. This guide walks through what drives your bill, gives you real 2026 pricing data, and includes a free calculator so you can work out your own cost in seconds.

Factor	2026 Snapshot	Status
National average price	$2.67 per gallon	Varies by state
Cheapest state	Nebraska, about $1.64/gal	Standard
Most expensive state	Florida, about $4.71/gal	Caution
Typical 500-gallon fill	Roughly $1,070 (400 usable gallons)	Varies by state
Seasonal swing	Summer runs 12-18% below winter peak	Standard

How do you calculate your propane gas bill?

You calculate your propane bill by multiplying the gallons delivered by your price per gallon, then adding any delivery fees, taxes, or tank rental charges. That is the whole formula: gallons times price, plus fees. Propane companies bill you for what actually goes into your tank, not for a flat monthly rate like a utility.

Most residential tanks only get filled to 80% capacity. That safety margin leaves room for the propane to expand in warm weather. So a 500-gallon tank holds about 400 usable gallons, and a 1,000-gallon tank holds about 800. If your tank reads “empty” and you order a fill, your delivery driver is measuring how many gallons it takes to bring you back up to that 80% line, not to the very top.

According to the EIA’s residential propane survey, the national average sat at $2.67 per gallon as of early August 2026, with state averages ranging from about $1.64 in Nebraska to $4.71 in Florida. Your own price depends heavily on where you live, so plug your local rate into the calculator below rather than relying on the national number.

Propane gas bill calculator

Enter your tank size or the gallons you plan to buy, your local price per gallon, and any delivery or tank rental fees. The calculator gives you the total cost of a fill and an estimated monthly budget if you spread that cost across a heating season.

Why does propane cost so much more in some states?

Propane costs more in states like Florida because delivery distance from Gulf Coast production hubs and limited heating-season sales volume push up the per-gallon price. States close to production and storage hubs, like Nebraska, see lower prices because trucks travel shorter distances and suppliers compete harder for year-round customers.

The Mont Belvieu wholesale benchmark, the raw commodity price before delivery and markup, sat around $0.66 per gallon in mid-2026. Everything above that number in your bill covers trucking, storage, local competition, and dealer margin. That gap between wholesale and retail is why shopping around between two or three local dealers can save real money, sometimes 10 to 20% on the same gallon of propane.

For homeowners in the Northeast and Florida, where prices run well above the national average, locking in a fixed price plan before the winter season starts is one of the most reliable ways to avoid a painful January bill.

When is propane cheapest to buy?

Propane is cheapest in late summer, typically August and September, when prices run 12 to 18% below the winter peak. Demand drops once heating season ends, so suppliers lower prices to keep trucks moving and tanks turning over.

Prices then climb through fall as households start filling tanks for winter, and usually peak in January or February when cold weather drives demand highest and supply gets tightest. A pre-buy or summer-fill contract, where you lock in gallons or a price at the summer rate, is one of the simplest ways to avoid paying the winter premium.

If you own your tank rather than lease it, you have full freedom to time your fills around these seasonal swings. Renters usually have to work within their supplier’s delivery schedule, which can limit how much of that summer discount they capture.

How do you use the propane calculator step by step?

You use the calculator by entering four numbers: your tank size, your local price per gallon, any fees, and how many fills you expect this season. Here is the exact process.

1. Pick your tank size from the dropdown, or choose “Custom gallons” if you only want to price out a partial fill.
2. Enter your local price per gallon. Check your supplier’s quote or your state average if you do not have a current number.
3. Add any delivery or hazmat fee your supplier charges per visit.
4. Add your annual tank rental fee, if you lease your tank instead of owning it.
5. Enter how many times you expect to fill up during the heating season, usually one to three times depending on tank size and usage.
6. Click “Calculate My Propane Cost” to see your cost per fill, total season cost, and a suggested monthly budget.

How can you lower your propane bill?

You can lower your propane bill by comparing prices between local dealers, buying during the summer price dip, and consolidating deliveries so you pay fewer delivery fees. Small changes in timing and supplier choice add up to real savings over a full heating season.

• Get quotes from at least two or three dealers each season instead of auto-renewing with the same one.
• Ask about a summer-fill or pre-buy program to lock in the lower off-season rate.
• Combine smaller top-ups into fewer, larger deliveries to cut down on per-visit delivery charges.
• Check whether owning your tank instead of renting saves money over a few years, since rental fees add up.
• Fix drafts and add insulation around your home. Less heat loss means fewer gallons burned no matter what the price per gallon is.

A wireless tank level sensor, which clips onto your existing tank and reports the real fill level to an app, can also help. Float gauges on residential tanks are commonly off by 10 to 30%, so an accurate reading helps you time your will-call order instead of guessing and paying rush delivery fees.

Running the numbers with the calculator above before your delivery arrives also helps you catch billing mistakes. If your invoice comes back noticeably higher than what you calculated, ask your supplier for a breakdown of the gallons delivered, the locked-in price, and every fee charged. Suppliers occasionally bill an old rate after a price change, and a quick phone call can fix that before you pay.

What size propane tank do you need?

The tank size you need depends mostly on your home’s square footage and how many propane appliances you run. A small 120-gallon tank works fine for a single appliance, like a stove or a fireplace. A whole-home heating setup usually calls for a 500-gallon or 1,000-gallon tank instead.

Here is a general guide many suppliers use when sizing a tank for a household.

Home size	Typical use	Recommended tank
Under 1,500 sq ft	Cooking, water heater, or dryer only	120-250 gallons
1,500-2,500 sq ft	Whole-home heat plus appliances	500 gallons
Over 2,500 sq ft	Whole-home heat, pool heater, generator	1,000 gallons

A bigger tank usually means a lower price per gallon, since suppliers reward larger deliveries with better rates and you need fewer truck visits. It also means fewer delivery fees over the course of a year. The tradeoff is a higher upfront cost if you choose to buy the tank instead of renting it, and it takes up more space on your property.

How does propane compare to natural gas and electric heat?

Propane usually costs more per unit of heat than natural gas but often costs less to run than electric resistance heating. The fair way to compare fuels is by looking at the cost per British Thermal Unit, or BTU, since propane, natural gas, and electricity are priced in totally different units on your bill.

Natural gas has the advantage of a fixed pipeline connection with no deliveries and no tank to manage, but it is only available in areas with gas mains already installed. That rules it out for most rural homes, which is exactly why propane is common in areas like the Catskills, Adirondacks, and other spots far from a gas utility’s service area.

Electric heat pumps have gotten a lot more efficient in recent years and can beat propane on cost in mild climates. In very cold climates, though, propane furnaces tend to keep homes warmer for less money once outdoor temperatures drop well below freezing, since heat pump efficiency falls as the temperature drops.

If you are deciding between fuel types for a new build or a furnace replacement, run the numbers for your specific home rather than going by fuel type alone. Insulation quality, local utility rates, and your area’s winter temperatures all shift the answer.

What fees show up on a propane bill besides the gallon price?

Besides the per-gallon charge, most propane bills include a delivery fee, a hazmat handling fee, and sometimes a tank rental fee if you do not own your tank. Some suppliers also charge a minimum fill fee if you order a small top-up rather than a full delivery.

Delivery and hazmat fees typically run somewhere between $20 and $75 per visit, though this varies a lot by supplier and region. Tank rental fees are usually billed once a year and can run anywhere from $75 to $200 depending on tank size. These fees do not change based on how much propane you use, so scheduling fewer, larger deliveries is one of the easiest ways to reduce their overall impact on your bill.

Always ask your supplier for an itemized quote before your first delivery so you know exactly which fees apply to your account. Some companies waive the delivery fee if you sign up for automatic delivery scheduling instead of calling in a will-call order.

FAQ

How many gallons of propane does an average house use per year?

An average home that heats with propane uses roughly 700 to 1,000 gallons per year. Homes that also use propane for cooking, hot water, or a fireplace tend to land toward the higher end of that range.

Is it cheaper to own or rent a propane tank?

Owning is usually cheaper over the long run since you avoid the annual rental fee, but it comes with an upfront purchase cost. Renting makes more sense if you only plan to stay in your home a short time.

Why did my propane bill go up even though I used the same amount?

Your bill went up because the per-gallon price changed, not because your usage did. Propane prices shift with the season, crude oil markets, and local supply, so the same number of gallons can cost noticeably more in January than it did in August.

Does propane go bad if it sits in the tank a long time?

No, propane does not expire or degrade in a properly sealed tank. It can sit for years without losing quality, which is why summer pre-buys and stockpiling before winter are safe options for cutting costs.

References

1. PropaneCostPerGallon.com, “Propane Cost Per Gallon 2026: Average + Prices by State & Near You” (2026)
2. PropanePricePerGallon.com, “US Propane Price 2026: Residential” (2026)
3. PropanePricePerGallon.com, “Propane Price Per Gallon 2026: National Average, Track, EIA Forecast” (2026)
4. PropaneCostPerGallon.com, “New York Propane Price 2026: Cost Per Gallon, Suppliers & Delivery” (2026)
5. U.S. Energy Information Administration, Weekly Heating Oil and Propane Prices survey (2026)