Cost to Run a Window Air Conditioner in Massachusetts
Massachusetts's average residential electricity rate is 28.8¢/kWh as of May 2026 — the 47th cheapest in the country, 57% above the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $63.04 per month.
Per hour
$0.26
at 500–1,500 W
Per day
$2.07
8 hours/day
Per month
$63.04
219 kWh
Per year
$757
2,628 kWh
By usage level in Massachusetts
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $1.04 | $31.52 | $378 |
| Typical (8 hrs/day) | $2.07 | $63.04 | $757 |
| Heavy (16 hrs/day) | $4.15 | $126 | $1,514 |
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 28.8¢/kWh (May 2026), a window air conditioner with typical usage costs about $2.07 per day, $63.04 per month, or $757 per year.
Is running a window air conditioner in Massachusetts more expensive than average?
Yes. Massachusetts's electricity costs about 57% more than the U.S. average, so the same usage costs $63.04 per month here versus $40.27 nationally.
What does electricity cost in Massachusetts right now?
Massachusetts residents pay an average of 28.8¢ per kWh as of May 2026 — the 47th cheapest rate of the 51 U.S. jurisdictions we track.