U.S. residential electricity EIA data: July 2026 US average 18.3¢/kWh Updated
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Cooling · Ohio

How Much Does It Cost to Run a Window Air Conditioner in Ohio?

The short answer

Running a 900W window air conditioner in Ohio costs about $0.18 an hour. At 8 hours a day, that’s roughly $42.60 a month and $511 a year.

The estimate uses Ohio’s average residential electricity price of 19.5¢/kWh from EIA (July 2026) — 6% above the national average.

Source: U.S. EIA, July 2026 data · Updated

Window Air Conditioner cost by daily use in Ohio

Cost at 19.5¢/kWh, the Ohio average (EIA, Jul 2026)
Daily usekWh/monthPer dayPer monthPer year
1 hour/day 27.4 $0.18 $5.33 $63.89
2 hours/day 54.8 $0.35 $10.65 $128
4 hours/day 109.5 $0.70 $21.30 $256
8 hours/day 219.0 $1.40 $42.60 $511
12 hours/day 328.5 $2.10 $63.90 $767
24 hours/day 657.1 $4.20 $128 $1,533

Ohio vs other states

At typical use, a window air conditioner costs $511 a year in Ohio — $750 less than in Hawaii and $177 more than in Louisiana.

Ohio has the 16th-most-expensive residential electricity of the 50 states and DC. Ohio price per kWh · all states ranked

Electricity price trend in Ohio

19.5¢/kWh in July 2026 — ▲ +11.9% from a year earlier.

How to lower the cost of running a window air conditioner

Window air conditioners cool a single room and are far cheaper to run than central AC when you only need one or two rooms cool. Wattage scales with capacity: small 5,000 BTU units draw around 450–500W, a 10,000 BTU unit around 900W, and large 15,000+ BTU units 1,300–1,500W. ENERGY STAR models with inverter compressors can use 20–35% less. The compressor cycles with the thermostat, so enter the hours it actually runs.

  • Pick the right size — an oversized unit cycles constantly and dehumidifies poorly.
  • Seal the gaps around the unit with foam strips to keep hot air out.
  • Clean the washable filter every two weeks in peak season.
  • Summers in Ohio are relatively mild, so cooling costs are concentrated in a few hot weeks each year.

Questions

Frequently asked questions

How much does it cost to run a window air conditioner for 24 hours in Ohio?

Running a 900W window air conditioner for 24 hours uses about 21.6 kWh, which costs about $4.20 at Ohio’s average rate of 19.5¢/kWh.

How many kWh does a window air conditioner use per month?

At 8 hours a day, a typical window air conditioner uses about 219 kWh a month. In Ohio that costs $42.60.

Is it expensive to run a window air conditioner in Ohio?

Ohio has the 16th-most-expensive residential electricity of the 50 states and DC at 19.5¢/kWh — pricier than most. Running a window air conditioner here costs about $511 a year at typical use, compared with $481 at the national average rate.

What is the electricity rate in Ohio right now?

The average residential electricity rate in Ohio was 19.5¢ per kWh in July 2026, according to the latest EIA data — up 11.9% from a year earlier.

Is a window AC cheaper to run than central air?

For cooling one or two rooms, yes. A 900W window unit uses about a quarter of the power of a typical 3,500W central system.

Window Air Conditioner costs in nearby states

Cheapest and priciest states

Comparisons

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