Data through June 2026
Cost to run · Montana · 15.1¢/kWh residential average
How much does it cost to run a room air conditioner in Montana?
$81/yr · median certified model
Residential electricity in Montana runs 15.1¢/kWh — 17% under the U.S. average — putting the median certified room air conditioner at about $81 a year, versus $98 nationally.
In the national ranking, Montana lands at 16 of 51 for what a room air conditioner costs to run. At local rates, certified models span $39 (Brothers 102372) to $317 (Friedrich KCVL36B30A) per year — $278 of annual headroom that depends entirely on which unit you buy. For reference, the national extremes are Nevada (13.1¢/kWh) and Hawaii (52.7¢/kWh); the same median room air conditioner would cost $70 and $280 a year there.
The cheapest room air conditioners to run at Montana rates
| # | Model | kWh/yr | $/yr in MT |
|---|---|---|---|
| 1 | Brothers 102372 | 260 | $39 |
| 2 | Midea MWEUWA-05CRFN8-BCN4 | 260 | $39 |
| 3 | Vissani VAW05V1KWT | 260 | $39 |
| 4 | TCL T05WV9M | 274 | $41 |
| 5 | TCL T05WV9MB | 274 | $41 |
| 6 | TCL T05WV9R | 274 | $41 |
| 7 | TCL T05WV9RB | 274 | $41 |
| 8 | TCL W5WC72 | 274 | $41 |
| 9 | TCL W5WC72-B | 274 | $41 |
| 10 | TCL W5WC72M | 274 | $41 |
Price any model at Montana rates
Your rate, your numbers
- Per day
- 22¢
- Per month
- $6.71
- Per year
- $81
532 kWh/yr × 15.1¢/kWh = $81/yr
Prefilled with the median certified room air conditioner (532 kWh/yr). Every model page on this site carries its exact certified figure.
Questions, answered with the data
- How much does it cost to run a room air conditioner in Montana?
- About $81 a year for the median ENERGY STAR certified room air conditioner, at Montana's average residential rate of 15.1¢/kWh — that's $6.71 a month.
- Is electricity expensive in Montana?
- Montana's residential average of 15.1¢/kWh is 17% below the U.S. average of 18.3¢/kWh, ranking 16 of 51 jurisdictions (1 = cheapest).
- What's the cheapest room air conditioner to run in Montana?
- Among currently certified models, the Brothers 102372 costs the least at about $39 a year at Montana rates (260 kWh/yr).
- How does Montana compare with other states?
- The same median room air conditioner costs $70 a year in Nevada (the cheapest state) and $280 in Hawaii (the priciest). Montana sits at $81.
Keep digging
- All certified room air conditioners compared
- Room Air Conditioners costs in New Mexico (rank 14 of 51)
- Room Air Conditioners costs in Florida (rank 15 of 51)
- Room Air Conditioners costs in Arizona (rank 17 of 51)
- Room Air Conditioners costs in Wyoming (rank 18 of 51)
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Rate source: US EIA, average residential price of electricity, see methodology.