How much does an electric baseboard heater cost per month in Hawaii?

About $54.00 a month, assuming 1,500 W at a 50% duty cycle, 12 hours a day, 150 days a year at 48.00¢/kWh.

How many kilowatt-hours does an electric baseboard heater use?

Roughly 1,350 kWh a year under these assumptions, or 0.75 kWh for every hour it runs.

Is that expensive compared with other states?

Hawaii has the most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $247 a year.

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Cost to run an electric baseboard heater in Hawaii (July 2026 rates)

At 48.00¢ per kilowatt-hour — Hawaii's average residential price in July 2026 — running an electric baseboard heater costs $648 a year. That is 162% more than the national average of $247. Hawaii's residential rate is up 22.0% from July 2025, which moves this appliance from $531 to $648 a year.

Per hour: 36.0¢
Per day of use: $4.32
Per month: $54.00
Per year: $648

Assumption: 1,500 W at a 50% duty cycle, 12 hours a day, 150 days a year — 1,350 kWh a year. Per 6-foot section. A whole house typically has several running at once, so multiply by the number of sections in use. Use the calculator to swap in the numbers from your own model.

How Hawaii compares

Hawaii pays 48.00¢/kWh, the most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $401 more a year than the typical U.S. household pays for the same use. Running the same electric baseboard heater costs $172 a year in Louisiana and $648 in Hawaii, so where you live changes this bill by $476 a year.

State	Rate	Per month	Per year
New York	29.90¢	$33.64	$404
Massachusetts	30.49¢	$34.30	$412
Maine	32.41¢	$36.46	$438
California	33.61¢	$37.81	$454
Hawaii	48.00¢	$54.00	$648

States ranked by average residential price, cheapest first. See all 51 states for an electric baseboard heater.

What else costs about the same in Hawaii

Pool pump$829 a year in HI Garage refrigerator$432 a year in HI Space heater$415 a year in HI

Cutting the number down

Resistance heat is 1 kWh in, 1 kWh of heat out. There is no efficiency upgrade available; the only lever is running fewer of them, less often.
Furniture pushed against a baseboard blocks convection and makes the thermostat run the element longer.
Zoning by room is the built-in advantage. Turning unused rooms down to 55 F is where the savings live.

Questions

How much does an electric baseboard heater cost per month in Hawaii?: About $54.00 a month, assuming 1,500 W at a 50% duty cycle, 12 hours a day, 150 days a year at 48.00¢/kWh.
How many kilowatt-hours does an electric baseboard heater use?: Roughly 1,350 kWh a year under these assumptions, or 0.75 kWh for every hour it runs.
Is that expensive compared with other states?: Hawaii has the most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $247 a year.