Cost to Run a Air Purifier in Montana
Montana's average residential electricity rate is 13.9¢/kWh as of April 2026 — the 7th cheapest in the country, 26% below the U.S. average. At typical usage (24 hours/day (always on)), a air purifier here costs $4.06 per month.
Per hour
0.6¢
at 20–100 W
Per day
$0.13
24 hours/day (always on)
Per month
$4.06
29 kWh
Per year
$48.71
350 kWh
By usage level in Montana
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (12 hrs/day) | 6.7¢ | $2.03 | $24.35 |
| Typical (24 hrs/day) | $0.13 | $4.06 | $48.71 |
| Heavy (24 hrs/day) | $0.27 | $8.11 | $97.41 |
Montana vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a air purifier in Montana?
At Montana's current average residential rate of 13.9¢/kWh (April 2026), a air purifier with typical usage costs about $0.13 per day, $4.06 per month, or $48.71 per year.
Is running a air purifier in Montana more expensive than average?
No — it's cheaper. Montana's rate is about 26% below the U.S. average: $4.06 per month here versus $5.49 nationally.
What does electricity cost in Montana right now?
Montana residents pay an average of 13.9¢ per kWh as of April 2026 — the 7th cheapest rate of the 51 U.S. jurisdictions we track.