How much does a space heater cost per month in New Hampshire?

About $19.45 a month, assuming 1,500 W at a 60% duty cycle, 8 hours a day, 120 days a year at 27.01¢/kWh.

How many kilowatt-hours does a space heater use?

Roughly 864 kWh a year under these assumptions, or 0.90 kWh for every hour it runs.

Is that expensive compared with other states?

New Hampshire has the 8th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $158 a year.

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Cost to run a space heater in New Hampshire (June 2026 rates)

At 27.01¢ per kilowatt-hour — New Hampshire's average residential price in June 2026 — running a space heater costs $233 a year. That is 47% more than the national average of $158. New Hampshire's residential rate is up 14.9% from June 2025, which moves this appliance from $203 to $233 a year.

Per hour: 24.3¢
Per day of use: $1.94
Per month: $19.45
Per year: $233

Assumption: 1,500 W at a 60% duty cycle, 8 hours a day, 120 days a year — 864 kWh a year. 1,500 W is the ceiling for a 120 V plug-in heater, and nearly every model sold hits it on high. A thermostat changes how often it runs, not how hard. Use the calculator to swap in the numbers from your own model.

How New Hampshire compares

New Hampshire pays 27.01¢/kWh, the 8th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $74.91 more a year than the typical U.S. household pays for the same use. Running the same space heater costs $113 a year in Nevada and $456 in Hawaii, so where you live changes this bill by $342 a year.

State	Rate	Per month	Per year
Vermont	24.44¢	$17.60	$211
New Jersey	24.95¢	$17.96	$216
New Hampshire	27.01¢	$19.45	$233
Alaska	28.21¢	$20.31	$244
Rhode Island	29.23¢	$21.05	$253

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

What else costs about the same in New Hampshire

Portable air conditioner$228 a year in NH Garage refrigerator$243 a year in NH Electric clothes dryer$211 a year in NH

Cutting the number down

Heating one occupied room and letting the rest of the house sit cooler is the whole case for a space heater. Running one in every room costs more than central heat.
Ceramic, oil-filled and infrared heaters all convert essentially 100% of the electricity to heat. At the same wattage the running cost is identical, whatever the box claims.
The cheapest watt is the one you skip: closing the door to the room you are heating does more than any model upgrade.

Questions

How much does a space heater cost per month in New Hampshire?: About $19.45 a month, assuming 1,500 W at a 60% duty cycle, 8 hours a day, 120 days a year at 27.01¢/kWh.
How many kilowatt-hours does a space heater use?: Roughly 864 kWh a year under these assumptions, or 0.90 kWh for every hour it runs.
Is that expensive compared with other states?: New Hampshire has the 8th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $158 a year.