Cost to Run a Window Air Conditioner in Massachusetts
Massachusetts's average residential electricity rate is 30.5¢/kWh as of July 2026 — the 48th cheapest in the country, 67% above the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $66.76 per month.
Per hour
$0.27
at 500–1,500 W
Per day
$2.20
8 hours/day
Per month
$66.76
219 kWh
Per year
$802
2,628 kWh
By usage level in Massachusetts
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $1.10 | $33.38 | $401 |
| Typical (8 hrs/day) | $2.20 | $66.76 | $802 |
| Heavy (16 hrs/day) | $4.39 | $134 | $1,603 |
Massachusetts vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a window air conditioner in Massachusetts?
At Massachusetts's current average residential rate of 30.5¢/kWh (July 2026), a window air conditioner with typical usage costs about $2.20 per day, $66.76 per month, or $802 per year.
Is running a window air conditioner in Massachusetts more expensive than average?
Yes. Massachusetts's electricity costs about 67% more than the U.S. average, so the same usage costs $66.76 per month here versus $40.06 nationally.
What does electricity cost in Massachusetts right now?
Massachusetts residents pay an average of 30.5¢ per kWh as of July 2026 — the 48th cheapest rate of the 51 U.S. jurisdictions we track.