How much does a central air conditioner cost per month in New Jersey?

About $48.90 a month, assuming 3,500 W at a 70% duty cycle, 8 hours a day, 120 days a year at 24.95¢/kWh.

How many kilowatt-hours does a central air conditioner use?

Roughly 2,352 kWh a year under these assumptions, or 2.45 kWh for every hour it runs.

Is that expensive compared with other states?

New Jersey has the 9th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $431 a year.

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Cost to run a central air conditioner in New Jersey (June 2026 rates)

At 24.95¢ per kilowatt-hour — New Jersey's average residential price in June 2026 — running a central air conditioner costs $587 a year. That is 36% more than the national average of $431.

Per hour: 61.1¢
Per day of use: $4.89
Per month: $48.90
Per year: $587

Assumption: 3,500 W at a 70% duty cycle, 8 hours a day, 120 days a year — 2,352 kWh a year. A 3-ton central system draws roughly 3,500 W with the air handler running. Older or oversized units cycle harder and land higher. Use the calculator to swap in the numbers from your own model.

How New Jersey compares

New Jersey pays 24.95¢/kWh, the 9th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $155 more a year than the typical U.S. household pays for the same use. Running the same central air conditioner costs $308 a year in Nevada and $1,240 in Hawaii, so where you live changes this bill by $932 a year.

State	Rate	Per month	Per year
District of Columbia	24.39¢	$47.80	$574
Vermont	24.44¢	$47.90	$575
New Jersey	24.95¢	$48.90	$587
New Hampshire	27.01¢	$52.94	$635
Alaska	28.21¢	$55.29	$663

States ranked by average residential price, cheapest first. See all 51 states for a central air conditioner.

What else costs about the same in New Jersey

Hot tub$624 a year in NJ Heat pump$539 a year in NJ Pool pump$431 a year in NJ

Cutting the number down

Each degree you raise the thermostat in summer trims roughly 3% off cooling energy. Two degrees is a rounding error in comfort and a visible line on the bill.
A clogged filter makes the blower work against restriction for an entire season. Replacing it is the cheapest maintenance in the house.
Cooling load tracks the indoor/outdoor gap, so the same thermostat setting costs far more in a 100 F week than an 85 F one.

Questions

How much does a central air conditioner cost per month in New Jersey?: About $48.90 a month, assuming 3,500 W at a 70% duty cycle, 8 hours a day, 120 days a year at 24.95¢/kWh.
How many kilowatt-hours does a central air conditioner use?: Roughly 2,352 kWh a year under these assumptions, or 2.45 kWh for every hour it runs.
Is that expensive compared with other states?: New Jersey has the 9th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $431 a year.