Window AC Electricity Calculator in Hawaii

A window ac in Hawaii costs about $100.70 a month ($1225.17 a year) to run at the state's average rate of 46.62 ¢/kWh. Use this calculator to compare light, typical, and heavy use.

Hawaii average rate
46.62 ¢/kWh
Assumed wattage
900 W
Typical usage pattern
8 hours/day
Typical monthly cost
$100.70
Typical yearly cost
$1225.17

Key metrics

MetricValue
Hawaii average rate46.62 ¢/kWh
Assumed wattage900 W
Typical usage pattern8 hours/day
Typical monthly cost$100.70
Typical yearly cost$1225.17

Window AC in Hawaii vs U.S. benchmark

Hawaii monthly estimate
$100.70
U.S. monthly estimate
$41.73
Difference
+$58.97
State rate
46.62 ¢/kWh

Calculator assumptions

This calculator uses a typical wattage range of 500-1,500 W, and we assume 900 watts for 8 hours/day. The formula is kWh = (watts × hours) / 1000.

At this profile, the appliance uses 216.0 kWh per month and 2628.0 kWh per year.

Appliance calculator scenarios

ScenarioHours/dayAnnual energyHawaii monthlyU.S. monthlyHawaii yearly
Light usage4 hours/day1314.0 kWh$50.35$20.87$612.59
Typical usage8 hours/day2628.0 kWh$100.70$41.73$1225.17
Heavy usage12 hours/day3942.0 kWh$151.05$62.60$1837.76

Appliance cost reference page

Want the full write-up? The appliance page below uses the same rate and wattage assumptions:

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Source & Method

Source: U.S. Energy Information Administration (EIA) Retail Sales of Electricity. Updated: April 2026. Estimates use the EIA all-in average residential rate — energy, delivery, fixed charges, and utility fees together, not just the electricity itself. Fees are inside the rate, not an extra on top; how your own bill splits fixed versus per-kWh charges varies by utility. For what's inside the all-in rate, see hidden electricity fees; for how rates and estimates are defined, see the methodology hub.

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