How much does a box fan cost per month in South Carolina?

About $1.45 a month, assuming 75 W, 10 hours a day, 150 days a year at 15.47¢/kWh.

How many kilowatt-hours does a box fan use?

Roughly 112 kWh a year under these assumptions, or 0.07 kWh for every hour it runs.

Is that expensive compared with other states?

South Carolina has the 20th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $20.60 a year.

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Cost to run a box fan in South Carolina (July 2026 rates)

At 15.47¢ per kilowatt-hour — South Carolina's average residential price in July 2026 — running a box fan costs $17.40 a year. That is 16% less than the national average of $20.60. South Carolina's residential rate is up 5.2% from July 2025, which moves this appliance from $16.54 to $17.40 a year.

Per hour: 1.2¢
Per day of use: 11.6¢
Per month: $1.45
Per year: $17.40

Assumption: 75 W, 10 hours a day, 150 days a year — 112 kWh a year. 20-inch box fan on high. Low speed roughly halves the draw. Use the calculator to swap in the numbers from your own model.

How South Carolina compares

South Carolina pays 15.47¢/kWh, the 20th cheapest residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $3.20 less a year than the typical U.S. household pays for the same use. Running the same box fan costs $14.31 a year in Louisiana and $54.00 in Hawaii, so where you live changes this bill by $39.69 a year.

State	Rate	Per month	Per year
South Dakota	15.37¢	$1.44	$17.29
Arizona	15.38¢	$1.44	$17.30
South Carolina	15.47¢	$1.45	$17.40
West Virginia	15.78¢	$1.48	$17.75
Texas	15.88¢	$1.49	$17.86

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

What else costs about the same in South Carolina

Electric kettle$16.94 a year in SC Microwave$16.94 a year in SC Incandescent bulb$16.94 a year in SC

Cutting the number down

Pointing one out of an upstairs window at night pulls cool air through the whole house for a fraction of what cooling it costs.
Box fans are cheap to run but not free: continuous summer use adds up to real kilowatt-hours.

Questions

How much does a box fan cost per month in South Carolina?: About $1.45 a month, assuming 75 W, 10 hours a day, 150 days a year at 15.47¢/kWh.
How many kilowatt-hours does a box fan use?: Roughly 112 kWh a year under these assumptions, or 0.07 kWh for every hour it runs.
Is that expensive compared with other states?: South Carolina has the 20th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $20.60 a year.