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EV vs gas cost in Hawaii: $489 a year saved at 12,000 miles
With Hawaii electricity at 46.28¢/kWh and regular gasoline at $5.01/gal, a typical EV (0.3 kWh/mile, charged 80% at home) costs about 13.8¢ per mile to run versus 17.9¢ per mile for a 28 mpg gas car. That beats gas by $489 a year at 12,000 miles. Hawaii ranks #51 of 51 (50 states + DC) for annual savings and #51 for lowest residential electricity price.
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What the Hawaii numbers say
- Electricity: Hawaii residential average is 46.28¢/kWh year-to-date through July 2026, 154% above the U.S. average of 18.19¢. It is up 12.7% from the same period in 2025. Latest single month (July 2026): 48.00¢.
- Gasoline: $5.01/gal (EIA regional series: West Coast less California), up $1.13 from a year ago. The U.S. average is $4.28.
- Cost-equivalent MPG: a gas car would need about 36 mpg to cost the same per mile as this EV in Hawaii.
- If prices move: at 20% cheaper gas ($4.01) the yearly EV saving would be $60; at 20% higher electricity (55.54¢) it would be $222.
What this leaves out: purchase price, tax credits, insurance, maintenance, depreciation, home charger installation, time-of-use rates and cold-weather range loss. Your utility's own rate may differ from the state average. See the methodology.
Cost to run common things in Hawaii
- Space heater (1,500 W): $0.69 per hour
- Electric blanket (200 W): $0.74 per 8-hour night
- Window air conditioner (1,000 W): $0.46 per hour
- Electric clothes dryer: $1.39 per load
- Dishwasher: $0.46 per load
- Refrigerator: $208 per year
- Gaming PC (300 W under load): $0.14 per hour
- EV home charging (per 100 miles): $14 per 100 miles
Heating this winter? In Hawaii a heat pump costs about $54.25 per million BTU of heat vs $57.01 for a gas furnace and $30.95 for propane. Heat pump vs furnace in Hawaii.