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Cost to run a window air conditioner in Hawaii
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$0.42/hour
Window Air Conditioner at 900 W in Hawaii (47.18¢/kWh) · $103.27/month at 8 h/day
By hours of use
| Use | Per day | Per month | Per year |
|---|---|---|---|
| 1 h/day | $0.42 | $12.91 | $154.99 |
| 2 h/day | $0.85 | $25.82 | $309.97 |
| 4 h/day | $1.70 | $51.63 | $619.95 |
| 8 h/day | $3.40 | $103.27 | $1,239.89 |
| 12 h/day | $5.10 | $154.90 | $1,859.84 |
| 24 h/day | $10.19 | $309.80 | $3,719.67 |
A 8,000-10,000 BTU window unit draws roughly 700-1,000 W while the compressor runs.
Same appliance, nearby states
| State | ¢/kWh | Per month |
|---|---|---|
| Hawaii | 47.18 | $103.27 |
| California | 29.75 | $65.12 |
| Massachusetts | 30.48 | $66.71 |
| Maine | 32.11 | $70.28 |
FAQ
How much does it cost to run a window air conditioner in Hawaii?
At 900 W and 47.18¢/kWh: $0.42 per hour, $3.40 per day and $103.27 per month at 8 h/day.
How does Hawaii compare with other states?
The same use costs $27.84/month in Nevada (cheapest) and $103.27/month in Hawaii (most expensive); the US average is $39.75.
Price: EIA Electric Power Monthly, Table 5.6.A (residential, August 2026 preliminary; released October 23, 2026).
Window Air Conditioner cost calculator · Electricity cost in Hawaii
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