Average electric bill in Hawaii
Over the last 12 months the average price was 43.51¢ per kWh and the average home used 514 kWh a month, so a typical Hawaii household spent about $224 a month on electricity, or $2,684 a year. Use is 41% below the US average of 870 kWh a month, peaking in August at 573 kWh.
Driving a Tesla Model Y Long Range AWD 1,000 miles a month takes 275 kWh from the wall (EPA 27.5 kWh/100 mi), about $120 at the state average. A 25.5 mpg gasoline car covering the same distance at $4.73 a gallon (West Coast except California (PADD 5) average, August 2026) costs about $185.
The state average hides the real spread. Utilities in the same state charge different prices, and on a time-of-use plan the same kWh costs more in the peak hours than off-peak; each utility page shows by how much. Open Hawaiian Electric’s page to see its plans, prices by hour and fixed charge, or run the calculators below with Hawaii preloaded.
Natural gas for homes averaged $6.29 per therm over the 12 months to June 2026 (EIA, all charges included), and a typical gas-heated home uses about 1 therms a year for heating. The heat pump calculator compares that with electric heating on your plan.
A south-facing, 20° rooftop array in Hawaii produces about 1,714 kWh per installed kW a year (NREL PVWatts at the state’s population center). What that is worth depends on your utility’s export rule, shown on each utility’s page.