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How much does it cost to run an air purifier?
At the U.S. average residential price of 18.31¢ per kilowatt-hour (July 2026), running an air purifier costs about $80.20 a year. Your own bill depends on your state's rate, which ranges from 12.72¢ to 48.00¢ across the country.
- Per hour
- 0.9¢
- Per day of use
- 22.0¢
- Per month
- $6.68
- Per year
- $80.20
Assumption: 50 W, 24 hours a day, 365 days a year — 438 kWh a year. Mid-size HEPA unit on medium. High speed can triple the draw.
Cost by state
Same appliance, same usage, 51 different prices. Sorted cheapest first.
| State | Rate | Per month | Per year |
|---|---|---|---|
| Louisiana | 12.72¢ | $4.64 | $55.71 |
| Nevada | 12.77¢ | $4.66 | $55.93 |
| Utah | 13.12¢ | $4.79 | $57.47 |
| North Dakota | 13.41¢ | $4.89 | $58.74 |
| Tennessee | 13.71¢ | $5.00 | $60.05 |
| Idaho | 13.73¢ | $5.01 | $60.14 |
| Nebraska | 13.78¢ | $5.03 | $60.36 |
| Kentucky | 13.81¢ | $5.04 | $60.49 |
| Arkansas | 14.33¢ | $5.23 | $62.77 |
| Oklahoma | 14.35¢ | $5.24 | $62.85 |
| Wyoming | 14.36¢ | $5.24 | $62.90 |
| Mississippi | 14.54¢ | $5.31 | $63.69 |
| Washington | 14.71¢ | $5.37 | $64.43 |
| Montana | 14.99¢ | $5.47 | $65.66 |
| Florida | 15.03¢ | $5.49 | $65.83 |
| North Carolina | 15.16¢ | $5.53 | $66.40 |
| Kansas | 15.27¢ | $5.57 | $66.88 |
| South Dakota | 15.37¢ | $5.61 | $67.32 |
| Arizona | 15.38¢ | $5.61 | $67.36 |
| South Carolina | 15.47¢ | $5.65 | $67.76 |
| West Virginia | 15.78¢ | $5.76 | $69.12 |
| Texas | 15.88¢ | $5.80 | $69.55 |
| Oregon | 15.97¢ | $5.83 | $69.95 |
| Iowa | 15.99¢ | $5.84 | $70.04 |
| Missouri | 16.09¢ | $5.87 | $70.47 |
| New Mexico | 16.09¢ | $5.87 | $70.47 |
| Georgia | 16.27¢ | $5.94 | $71.26 |
| Alabama | 16.40¢ | $5.99 | $71.83 |
| Indiana | 16.73¢ | $6.11 | $73.28 |
| Colorado | 17.00¢ | $6.21 | $74.46 |
| Minnesota | 17.45¢ | $6.37 | $76.43 |
| Virginia | 17.55¢ | $6.41 | $76.87 |
| Delaware | 18.48¢ | $6.75 | $80.94 |
| Wisconsin | 19.06¢ | $6.96 | $83.48 |
| Illinois | 19.22¢ | $7.02 | $84.18 |
| Ohio | 19.45¢ | $7.10 | $85.19 |
| Maryland | 21.41¢ | $7.81 | $93.78 |
| Pennsylvania | 21.72¢ | $7.93 | $95.13 |
| Michigan | 23.05¢ | $8.41 | $101 |
| Vermont | 23.75¢ | $8.67 | $104 |
| Connecticut | 24.16¢ | $8.82 | $106 |
| New Jersey | 25.19¢ | $9.19 | $110 |
| District of Columbia | 25.21¢ | $9.20 | $110 |
| New Hampshire | 26.60¢ | $9.71 | $117 |
| Rhode Island | 28.29¢ | $10.33 | $124 |
| Alaska | 28.83¢ | $10.52 | $126 |
| New York | 29.90¢ | $10.91 | $131 |
| Massachusetts | 30.49¢ | $11.13 | $134 |
| Maine | 32.41¢ | $11.83 | $142 |
| California | 33.61¢ | $12.27 | $147 |
| Hawaii | 48.00¢ | $17.52 | $210 |
Cutting the number down
- Right-sizing to the room lets you run a bigger unit on low instead of a small one on high, which is quieter and cheaper for the same clean-air delivery.
- A loaded filter forces the fan to work harder for less airflow, so late-life filters cost more per unit of clean air.
Questions
- How many watts does an air purifier use?
- About 50 W while running.
- How much does an air purifier cost per month?
- About $6.68 a month at the U.S. average rate, or $80.20 a year.
- Where is it cheapest to run?
- Louisiana, at $55.71 a year, versus $210 in Hawaii — a spread of $155.