Natural Gas Heating Cost Calculator
Estimate your natural gas heating bill in therms and dollars, and see how it compares with oil, propane, electricity and a heat pump.
Natural gas in Connecticut, winter (Oct–Mar)
$1,421 per winter
631 therms · about $237 per month
Cheapest here: Cold-climate heat pump at $1,356, about $64 less than natural gas.
Price used: $2.25/therm, which is about $23.33 per thousand cubic feet (1 Mcf = 10.36 therms).
Compared with other fuels
| Cold-climate heat pump | $1,356 | 4,809 kWh · $0.282/kWh · seasonal COP 3.1 | |
|---|---|---|---|
| Natural gas (selected) | $1,421 | 631 therms · $2.25/therm · AFUE 0.8 | |
| Heating oil | $2,675 | 439 gallons · $6.094/gal · AFUE 0.83 | |
| Propane | $2,920 | 690 gallons · $4.233/gal · AFUE 0.8 | |
| Electric baseboard | $4,171 | 14,791 kWh · $0.282/kWh · 100% |
Monthly cost
- Oct$108
- Nov$191
- Dec$275
- Jan$323
- Feb$279
- Mar$243
Assumptions
- Home: 2,000 sq ft, average insulation.
- Weather: 5,047 heating degree days for Connecticut (NOAA 1991–2020 normals, winter (Oct–Mar)).
- Useful heat needed: 50 million BTU.
- Heating oil: $6.094/gal (EIA Connecticut average, week of Oct 12, 2026).
- Propane: $4.233/gal (EIA Connecticut average, week of Oct 12, 2026).
- Natural gas: $2.25/therm (EIA Connecticut, latest month (May 2026)).
- Electricity: $0.282/kWh (EIA Connecticut 12-month average to Jul 2026).
Estimates only, based on average prices and typical weather. Your actual cost depends on your home, equipment, usage and local supplier. Not financial or engineering advice.
Residential natural gas prices by state
EIA 12-month average residential price to Jul 2026. 1 Mcf = 10.36 therms. States with no EIA value for the period are left out.
| Alabama | $2.04 | $21.18 |
| Arizona | $2.13 | $22.02 |
| Arkansas | $2.61 | $27.05 |
| California | $2.12 | $21.96 |
| Colorado | $1.25 | $12.98 |
| Connecticut | $2.25 | $23.33 |
| Delaware | $2.27 | $23.56 |
| District of Columbia | $2.07 | $21.48 |
| Florida | $2.28 | $23.62 |
| Georgia | $2.72 | $28.13 |
| Idaho | $0.92 | $9.57 |
| Illinois | $1.48 | $15.31 |
| Indiana | $1.57 | $16.23 |
| Iowa | $1.48 | $15.31 |
| Kansas | $1.87 | $19.36 |
| Kentucky | $2.30 | $23.81 |
| Louisiana | $2.43 | $25.19 |
| Maine | $2.62 | $27.13 |
| Maryland | $1.87 | $19.40 |
| Massachusetts | $2.64 | $27.39 |
| Michigan | $1.35 | $13.99 |
| Minnesota | $1.23 | $12.75 |
| Mississippi | $2.23 | $23.09 |
| Missouri | $2.18 | $22.55 |
| Montana | $1.00 | $10.35 |
| Nebraska | $1.61 | $16.71 |
| Nevada | $1.21 | $12.56 |
| New Hampshire | $2.15 | $22.27 |
| New Jersey | $1.55 | $16.07 |
| New Mexico | $1.12 | $11.62 |
| New York | $2.15 | $22.24 |
| North Carolina | $2.43 | $25.19 |
| North Dakota | $1.42 | $14.71 |
| Ohio | $2.05 | $21.25 |
| Oklahoma | $2.45 | $25.43 |
| Oregon | $1.85 | $19.12 |
| Pennsylvania | $1.92 | $19.93 |
| Rhode Island | $2.13 | $22.05 |
| South Carolina | $2.19 | $22.73 |
| South Dakota | $1.22 | $12.66 |
| Tennessee | $1.60 | $16.58 |
| Texas | $2.62 | $27.16 |
| Utah | $1.09 | $11.32 |
| Vermont | $2.16 | $22.43 |
| Virginia | $2.10 | $21.74 |
| Washington | $1.93 | $20.02 |
| West Virginia | $1.89 | $19.59 |
| Wisconsin | $1.30 | $13.43 |
| Wyoming | $1.65 | $17.14 |
Frequently asked questions
How much does natural gas heating cost per winter?
It depends on your state, home size and insulation. Enter them above for an estimate based on EIA's 12-month average residential gas price and normal weather.
What is a therm and how does it relate to Mcf?
A therm is 100,000 BTU. Gas utilities often bill in therms or in hundred cubic feet, while EIA reports dollars per thousand cubic feet (Mcf). We use 1 Mcf = 10.36 therms.
Why are the gas prices not the latest month?
EIA publishes residential natural gas prices monthly with a delay of a couple of months; the latest period here is Jul 2026. We use the 12-month average so one seasonal month does not skew the estimate.
Is a heat pump cheaper than natural gas?
Often not by much, and it varies by state. The comparison chart in your result shows a cold-climate heat pump next to gas for the same home.