Propane at home
How much propane does a home use?
A whole-home propane household, one that heats, makes hot water and cooks with propane, typically burns somewhere between 800 and 1,200 gallons a year, most of it in the heating months. Space heat is the big driver, so a cold-climate home can use far more and a cooking-only home far less.
Updated Jul 9, 2026
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A home that heats, makes hot water and cooks with propane typically uses somewhere between 800 and 1,200 gallons a year, and the large majority of that burns in the heating months. Space heating is the swing factor by far, so the honest answer to how much propane a house uses is a range, not a single number: a cold-climate home that heats with propane can run well past 1,500 gallons, while a home that only cooks and heats water with it might use 200 to 300. What follows is how to place your own house in that range.
What drives the number
Two things set a home's propane use: the climate and how many of its systems run on propane. Space heat dominates the bill. EIA counts about 6.6 million US households that heat primarily with propane, the largest share of them in the Midwest. Add a propane water heater, range, clothes dryer or standby generator and the annual total climbs, but none of those rival the furnace in a cold winter. A mild-climate house using propane only for cooking sits at the bottom of the range; a northern house heating entirely with propane sits at the top.
The per-household figures worth trusting come from EIA, which builds them from its Residential Energy Consumption Survey and adjusts them to each winter's actual weather. For the 2025-26 winter, EIA's Winter Fuels Outlook put the average propane-heating household at about 641 gallons for the season in the Midwest and about 519 gallons in the Northeast. Those are averages across very different houses, which is why this guide talks in ranges.
Tank sizes and the 80 percent rule
Residential propane is stored in a handful of standard tank sizes: 120, 250, 500 and 1,000 gallons. The 500-gallon tank is the common whole-home heating size; 1,000-gallon tanks serve larger homes and higher demand. One rule governs all of them. A propane tank is never filled past 80 percent of its water capacity, because propane is a liquid that expands substantially as it warms, far more than water does over the same temperature rise. The 20 percent of empty space at the top is the room the liquid needs to expand into on a hot day without driving the pressure up. In practice a 500-gallon tank holds about 400 gallons of usable propane, and a gauge reading 80 percent on a cool day is a full tank.
Heating degree days, the demand yardstick
The reason usage tracks the weather so closely is captured by heating degree days. A heating degree day counts how far the day's average temperature fell below 65 degrees Fahrenheit, and the count is summed over the season. More heating degree days means a colder stretch and more propane burned. It is the yardstick EIA and the industry use to compare one winter's heating demand to another, and it is why the same house can burn noticeably more propane in a cold year than a mild one.
One more constant is worth knowing: a gallon of propane holds about 91,500 British thermal units of energy, per EIA. That figure is what lets you compare propane to other heating fuels on an even footing, which is a separate guide.
Worked example: a winter month in the Midwest
Put real numbers on it, using EIA's Midwest figure of about 641 gallons across the October-through-March heating season.
At the live Midwest residential price above, $2.184 a gallon as of the last survey week ending March 30, 2026, that full heating season runs about $1,400 in propane. Spread across the season it is a little over 100 gallons in an average month, but the cold core of winter is heavier: a December or January that burns 120 gallons costs roughly $260 at that price. These are illustrative figures built on EIA's regional average and the live price, not a quote for any particular house, and the price shown updates when the survey resumes in October.
For how the price itself is built, from the Mont Belvieu hub to your tank, and for the contract choices a household faces every summer, see the related guides.
The Fill Line is a free weekly read of the public propane numbers. Stocks, the Mont Belvieu spot and the weekly supply balance update year round; the state price survey resumes in October. One email a week on what moved.
Try it
Propane carries about 91,452 Btu per gallon, per the EIA energy conversion tables, so gallons are total Btu input ÷ 91,452. Cylinder sizes use 4.24 lb of propane per gallon: a properly filled 20-lb cylinder holds about 4.7 gallons. Tank sizes are nominal shell capacity; tanks fill to at most 80% (the 80% rule) and the gauge reads percent of the shell. The state price is the EIA weekly state residential survey figure, published October through March; between surveys the last surveyed price prefills, labeled with its date, and stays editable. Everything here is arithmetic on the numbers you enter — weather, burner cycling, appliance condition, and gauge accuracy all move real usage. It is an estimate, not delivery scheduling, tank sizing, or safety advice.
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Now look at the live data
Common questions
How much propane does a house use per month?
It depends on climate and what runs on propane, but a whole-home-heat house often uses a little over 100 gallons a month averaged across the heating season, with the coldest months running higher, on the order of 100 to 130 gallons. A home that only cooks and heats water with propane uses far less, often under 30 gallons a month.
What size propane tank do I need to heat a home?
A 500-gallon tank is the common size for whole-home heating and holds about 400 usable gallons at the 80 percent fill limit. Larger homes or higher demand often step up to a 1,000-gallon tank. Smaller 120 and 250-gallon tanks suit homes that use propane for cooking, hot water or a single appliance.
Why is a propane tank only filled to 80 percent?
Propane expands substantially as it warms, much more than water. Filling only to 80 percent of the tank's water capacity leaves room for the liquid to expand on a hot day without raising the pressure to an unsafe level. A gauge that reads 80 percent on a cool day is a full tank.
How long does a tank of propane last?
It depends on the tank size and the weather. A 500-gallon tank filled to its 400-gallon working capacity might carry a whole-home-heat house through much of a Midwest winter, or only a couple of the coldest months in a severe stretch. Usage is driven by heating degree days, so the same fill lasts longer in a mild winter than a cold one.