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Cost to run a dehumidifier in California
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$0.13/hour
Dehumidifier at 450 W in California (29.75¢/kWh) · $40.70/month at 10 h/day
By hours of use
| Use | Per day | Per month | Per year |
|---|---|---|---|
| 1 h/day | $0.13 | $4.07 | $48.86 |
| 2 h/day | $0.27 | $8.14 | $97.73 |
| 4 h/day | $0.54 | $16.28 | $195.46 |
| 8 h/day | $1.07 | $32.56 | $390.92 |
| 10 h/day | $1.34 | $40.70 | $488.64 |
| 12 h/day | $1.61 | $48.84 | $586.37 |
| 24 h/day | $3.21 | $97.68 | $1,172.75 |
Portable dehumidifiers draw about 300-700 W; Energy Star models remove more water per kWh.
Same appliance, nearby states
| State | ¢/kWh | Per month |
|---|---|---|
| California | 29.75 | $40.70 |
| Rhode Island | 28.18 | $38.55 |
| New York | 28.65 | $39.19 |
| Alaska | 29.41 | $40.23 |
| Massachusetts | 30.48 | $41.70 |
| Maine | 32.11 | $43.93 |
| Hawaii | 47.18 | $64.54 |
FAQ
How much does it cost to run a dehumidifier in California?
At 450 W and 29.75¢/kWh: $0.13 per hour, $1.34 per day and $40.70 per month at 10 h/day.
How does California compare with other states?
The same use costs $17.40/month in Nevada (cheapest) and $64.54/month in Hawaii (most expensive); the US average is $24.84.
Price: EIA Electric Power Monthly, Table 5.6.A (residential, August 2026 preliminary; released October 23, 2026).
Dehumidifier cost calculator · Electricity cost in California
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