Cost to Run a Air Purifier in Illinois
Illinois's average residential electricity rate is 23.9¢/kWh as of May 2026 — the 40th cheapest in the country, 30% above the U.S. average. At typical usage (24 hours/day (always on)), a air purifier here costs $6.97 per month.
Per hour
1.0¢
at 20–100 W
Per day
$0.23
24 hours/day (always on)
Per month
$6.97
29 kWh
Per year
$83.75
350 kWh
By usage level in Illinois
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (12 hrs/day) | $0.11 | $3.49 | $41.87 |
| Typical (24 hrs/day) | $0.23 | $6.97 | $83.75 |
| Heavy (24 hrs/day) | $0.46 | $13.95 | $167 |
Illinois 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 Illinois?
At Illinois's current average residential rate of 23.9¢/kWh (May 2026), a air purifier with typical usage costs about $0.23 per day, $6.97 per month, or $83.75 per year.
Is running a air purifier in Illinois more expensive than average?
Yes. Illinois's electricity costs about 30% more than the U.S. average, so the same usage costs $6.97 per month here versus $5.37 nationally.
What does electricity cost in Illinois right now?
Illinois residents pay an average of 23.9¢ per kWh as of May 2026 — the 40th cheapest rate of the 51 U.S. jurisdictions we track.