How much does a rice cooker cost per month in Hawaii?

About $1.65 a month, assuming 700 W at a 40% duty cycle, 45 minutes a day, 200 days a year at 47.18¢/kWh.

How many kilowatt-hours does a rice cooker use?

Roughly 42 kWh a year under these assumptions, or 0.28 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 $7.63 a year.

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Cost to run a rice cooker in Hawaii (August 2026 rates)

At 47.18¢ per kilowatt-hour — Hawaii's average residential price in August 2026 — running a rice cooker costs $19.82 a year. That is 160% more than the national average of $7.63. Hawaii's residential rate is up 22.5% from August 2025, which moves this appliance from $16.18 to $19.82 a year.

Per hour: 13.2¢
Per day of use: 9.9¢
Per month: $1.65
Per year: $19.82

Assumption: 700 W at a 40% duty cycle, 45 minutes a day, 200 days a year — 42 kWh a year. Full draw while heating, then a low-power keep-warm hold. Use the calculator to swap in the numbers from your own model.

How Hawaii compares

Hawaii pays 47.18¢/kWh, the most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $12.19 more a year than the typical U.S. household pays for the same use. Running the same rice cooker costs $5.34 a year in Nevada and $19.82 in Hawaii, so where you live changes this bill by $14.47 a year.

State	Rate	Per month	Per year
Alaska	29.41¢	$1.03	$12.35
California	29.75¢	$1.04	$12.49
Massachusetts	30.48¢	$1.07	$12.80
Maine	32.11¢	$1.12	$13.49
Hawaii	47.18¢	$1.65	$19.82

States ranked by average residential price, cheapest first. See all 51 states for a rice cooker.

What else costs about the same in Hawaii

Electric pressure cooker$19.82 a year in HI Electric lawn mower$19.63 a year in HI Security camera$20.66 a year in HI

Cutting the number down

Keep-warm is a small draw that runs for hours. Switching it off once the rice is done is the only real lever here.

Questions

How much does a rice cooker cost per month in Hawaii?: About $1.65 a month, assuming 700 W at a 40% duty cycle, 45 minutes a day, 200 days a year at 47.18¢/kWh.
How many kilowatt-hours does a rice cooker use?: Roughly 42 kWh a year under these assumptions, or 0.28 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 $7.63 a year.