How Much Heating Oil Does a House Use?

The EIA expects the average oil-heated home in the United States to burn about 402 gallons between November and March this winter. Over a full year, the EIA’s 2020 household survey puts homes that use fuel oil at 507 gallons nationally and 542 in the Northeast, ranging nationally from about 272 gallons in a home under 1,000 square feet to about 762 in a home of 3,000 square feet or more.

Ranges like “300 to 800 gallons” circulate widely without a source or a period attached. The two EIA figures above have both, and the difference between them, five winter months against twelve, is the first thing to settle before budgeting. The second is weather: a January in the EIA’s Northeast forecast carries about 1,071 heating degree days and a November about 633, and the gallons follow. With last winter’s delivery slips and those degree days, one house’s own rate per degree day can be worked out in a few lines. For what a gallon costs and why, see the heating oil price guide; for how the fuel compares with propane, gas and electricity, see the cost per MMBtu comparison.

Three yardsticks, three different answers

The forecast is the narrowest. It covers five months, and it is built for the household that uses oil as its main heating fuel, so a house that burns a little kerosene in a space heater does not count. The survey is wider: it covers every month, so it includes the shoulder weeks in October and April and the hot-water use that continues in summer, and it groups fuel oil with kerosene in one category. It also describes a specific year, 2020, with that year’s weather. Neither number is wrong. They answer different questions.

The gap between 402 and 542 is 140 gallons, about 26 percent of the survey figure. A five-month winter and a full year with shoulder months and summer hot water explain a gap of that kind, but neither source splits the 140 gallons between them. The practical lesson is to match the yardstick to the period: use 402 for a November to March budget and the survey tables for a rough annual figure by house type.

Gallons by home size and home type

The 2020 survey table is the only one of the three that lets you see how much house size matters. It reports the average gallons of fuel oil or kerosene used by households that burn them, by square footage, housing type and region. These are national figures for all users of the fuel, so they mix the Northeast with the smaller number of oil users elsewhere.

The size gradient is steep. A home of 3,000 square feet or more uses about 2.8 times the oil of a home under 1,000 square feet, but only about 1.5 times that of a home of 1,500 to 1,999 square feet. Doubling floor area does not double oil use. The type rows show part of the reason: a single-family detached house uses 581 gallons on average, a single-family attached house 407, a unit in a two-to-four unit building 343 and a mobile home 309.

New England’s 602 gallons exceeds the Middle Atlantic’s 491, a gap consistent with the colder climate and older housing of northern New England. The South’s 318 gallons reflects a small number of oil users in a warmer climate. Because more than four out of five oil-heated homes are in the Northeast (3.388 million of 4.134 million in the EIA’s 2026 count, 82 percent), the Northeast rows are the ones that describe most oil customers.

The same survey table gives totals, which show how concentrated oil heating is. U.S. households burned 2,880 million gallons of fuel oil and kerosene in 2020. The Northeast accounted for 2,421 million of them, 84 percent, split between 1,238 million in New England and 1,183 million in the Middle Atlantic. Dividing the national total by the 507-gallon average implies about 5.7 million households using the fuel at all, against the 4.134 million that the 2026 outlook counts as using it for main heating. That difference is a second reason the 402 and 507 should not be set side by side: the survey counts any use of fuel oil or kerosene, the outlook counts homes where it is the main fuel.

What is inside the 402 gallons: five months of weather

The winter outlook also publishes monthly gallons. They are not equal, because heating oil use follows the weather. The table pairs the EIA’s monthly gallons with its Northeast heating degree day forecast, the weather series that best matches where oil is burned.

January is the peak at 97 gallons, 56 percent more than November’s 62, while the degree days rise by 69 percent from 633 to 1,071. The ratio of gallons to degree days is not constant, falling from 0.098 in November to 0.091 in January and rising again to 0.094 in March. That pattern is what a fixed daily load plus a weather-driven load would produce, and the EIA’s methodology notes describe exactly that structure: space heating in proportion to heating degree days, and the non-heating use of the same fuel spread evenly across the days of the season.

Backing out the two parts

A two-term least-squares fit of the five monthly gallons figures to days and Northeast degree days reproduces the table closely. It gives a base load of about 0.40 gallons per day and a weather-driven rate of about 0.079 gallons per degree day. Over the 151 days of the season the base load comes to roughly 61 gallons, and the degree days add roughly 341 gallons, for 402 in total against the EIA’s 402. The largest monthly error is under a third of a gallon. On those numbers, about 85 percent of the winter’s oil goes to space heating and about 15 percent to the weather-independent use, mostly water heating.

What the weather swing does to the total

With the rule in hand, a weather scenario is a one-line calculation. The EIA reports its Northeast heating degree day forecast as 12 percent lower than last winter, and its consumption forecast as 9 percent lower. Running last winter’s implied degree days through the fit is a way to test it.

The check works: the fit predicts 449 gallons for last winter’s weather, and dividing the EIA’s 402 by its stated 9 percent decline gives about 442. A 2 percent gap is the kind of agreement one expects from a rounded percentage. It also shows how much weather matters and how little it matters at the extremes: a winter 10 percent colder lifts the total by about 8.5 percent, because the base load does not move. For a household, the lesson is that a mild winter saves less than the weather alone suggests, and a harsh one costs less than feared, as long as the house is the same house.

From gallons to dollars

Price is the other half of a heating oil bill, and it is the half with the most disagreement between sources. The grid shows total cost for a range of gallons at four prices: $4.50 as a low bound, the EIA winter average of $5.26, the $6.19 U.S. average the EIA recorded in its retail survey for the week of October 19, 2026, and $7.00 as a high bound. Every cell is gallons multiplied by price. None of them is a forecast of what a delivery will cost.

Read the 402-gallon row against the EIA’s published $2,115. At a flat $5.26, 402 gallons costs $2,115; the same as the EIA’s $2,115 within rounding, because the gallons-weighted average of its monthly price path is $5.26. At the week-of-October-19 retail price of $6.19, the same 402 gallons comes to $2,488. That is $373 more than the EIA’s season expenditure, which says nothing about the EIA being wrong: the weekly survey measures one week, the outlook averages a path. The Winter Fuels Outlook also states that it does not count fuel bought ahead of use or at a contracted price, so a household that filled its tank earlier or locked a price may pay differently from either figure.

The same 402 gallons in eleven states

The EIA’s weekly survey also reports a price for individual states, which makes the cost of the same 402 gallons visible place by place. The spread between the cheapest and dearest state in the table is about 80 cents a gallon, or roughly $320 over a season at 402 gallons. The U.S. wholesale average for the same week was $5.323, so the national retail premium over wholesale was $0.87 a gallon, about $349 on 402 gallons, which is the delivery and dealer layer rather than the oil.

One week is a snapshot: every state in the table was well above where it stood a year earlier, with the U.S. average up $2.664 a gallon. The table is a reminder that the 402-gallon average and the $5.26 outlook price are inputs to a national forecast, and that a Rhode Island household and a Wisconsin household buying the same quantity this week would have paid about $240 apart.

A five-step estimate for one house

The delivery slips and the weather data are enough to build your own number. The steps below use an invented house so the inputs are visible. They are an illustration of the method, not data about a real home.

1. Total the last twelve months of deliveries. Use gallons delivered plus the change in tank level, not dollars. In the example, 640 gallons.
2. Estimate the base load. If the house has an oil-fired water heater, the gallons used in a summer month with no heating is the base. The example uses 22 gallons a month, or 264 a year.
3. Subtract it. 640 minus 264 leaves 376 gallons of space heating.
4. Divide by the heating degree days that produced it. If the example house’s town recorded 4,900 heating degree days over the months that count, the house used 0.077 gallons per degree day. This is the house’s own weather-driven rate, comparable with the 0.079 figure derived above for the average home.
5. Apply it to the new winter. Multiply the rate by forecast degree days and add the base. At the EIA’s Northeast base case of 4,331, the example comes to 332 gallons of space heating plus the 264 gallon base over twelve months, a full-year estimate of 596 gallons.

Two cautions. Heating degree days are published by weather services and by the EIA for broad regions, but your town’s numbers will differ from the regional totals. And the method assumes the thermostat, equipment and house stay the same between the two years. A new boiler, new windows or a changed thermostat habit changes the rate, and the rate is the part to re-measure.

Carrying the example house through to dollars shows what the estimate is for. At the EIA’s $5.26 average price, 596 gallons a year costs $3,137; at the $6.19 national retail average for the week of October 19, it costs $3,691, a difference of $555. The weather uncertainty, a 10 percent colder winter adding roughly 33 gallons, is worth $175 at the same price. Price, in other words, is the larger unknown in this example, which is why locking a price or filling a tank early is a separate decision from estimating the gallons.

Why two similar houses burn different amounts

The EIA states plainly that consumption and expenditures depend on the size and energy efficiency of individual homes, their heating equipment and operating conditions, and weather. The survey rows in Table 2 show size and type; they cannot show the rest. A short list of what to check when a house uses much more or less than the tables suggest:

• Equipment efficiency. Federal minimums for new oil equipment are 83 percent for furnaces and 86 percent for hot-water boilers. A burner and boiler pair installed decades ago may deliver less heat from each gallon. The cost comparison shows how efficiency enters the dollars.
• Indoor temperature and zoning. Heating degree days use a 65 degree baseline. A house held at 72 degrees needs more heat per degree day than one held at 66.
• Air leakage and insulation. The same square footage can lose heat at very different rates. The survey’s housing type rows capture shared walls but not the quality of the envelope.
• Secondary heat. The EIA counts secondary heating only when it uses the same fuel as the main system. A wood stove or electric space heater lowers oil use without appearing anywhere in the oil totals.
• Tank timing. A bill that shows deliveries is not a usage record. Two deliveries of 150 gallons in one calendar year do not mean 300 gallons were burned, if the tank was not full at both ends.

Data and sources: U.S. Energy Information Administration (EIA), Winter Fuels Outlook 2026-27, released October 6, 2026, checked October 23, 2026 (heating oil: 402 gallons, down 9 percent; $5.26 per gallon; $2,115; monthly gallons 62, 85, 97, 83 and 75; monthly prices $5.79, $5.46, $5.26, $5.06 and $4.84; Northeast heating degree days 633, 917, 1,071, 914 and 795, total 4,331, down 12 percent; 4.134 million oil households, 3.388 million in the Northeast; methodology notes on degree days and non-heating use). EIA, 2020 Residential Energy Consumption Survey, Table CE2.1, data release March 2023, revised March 2024, checked October 23, 2026 (gallons of fuel oil or kerosene per household using the fuel: United States 507, Northeast 542, New England 602, Middle Atlantic 491, Midwest 452, South 318; by square footage and housing type as tabled above). EIA, Heating Oil and Propane Update, week of October 19, 2026, checked October 23, 2026 ($6.190 per gallon U.S. average). EIA, Glossary: heating degree days, checked October 23, 2026. U.S. eCFR, 10 CFR 430.32, checked October 23, 2026 (83 percent AFUE oil furnaces; 86 percent oil hot-water boilers). The two-term fit, the scenario table, the cost grid, the percentages in Table 2 and the worked house are this page’s arithmetic on those inputs. The example house is invented for illustration.