How Much Does a Fan Cost to Run?
A typical 50 W fan running for 8 hours at $0.17/kWh costs about $0.07 per day or $2.04 across 30 days. Enter the wattage, number of fans, run time, days and electricity rate for your estimate.
Quick answerUsing the default US example of $0.17/kWh, a 50 W fan costs about 0.85 cents per hour, 6.8 cents for 8 hours, 20.4 cents for 24 hours, or $2.04 when used 8 hours a day for 30 days.
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Not sure which plug-in monitor fits? Compare a display meter with a smart plugHow it works
Total watts = watts per fan × number of fans. Hourly cost = total watts ÷ 1,000 × rate. Daily-use cost = hourly cost × hours per day. Monthly energy = total watts ÷ 1,000 × hours per day × days used per month; monthly cost multiplies that energy by the rate. Seasonal cost = daily-use cost × days used per year.
Fan running cost comparison
These examples assume 8 hours of use per day and electricity at $0.17 per kWh. The per-hour column uses cents so costs below one cent remain visible. Actual wattage varies by model and speed, so use the calculator above with the rating on your fan for a personal result.
| Fan type | Example power | Cost per hour | 8-hour cost | 30-day cost |
|---|---|---|---|---|
| Small desk fan | 30 W | 0.51¢ | $0.04 | $1.22 |
| DC ceiling fan | 25 W | 0.43¢ | $0.03 | $1.02 |
| Standard ceiling fan | 50 W | 0.85¢ | $0.07 | $2.04 |
| Tower fan | 60 W | 1.02¢ | $0.08 | $2.45 |
| Box fan | 75 W | 1.28¢ | $0.10 | $3.06 |
| Pedestal fan | 80 W | 1.36¢ | $0.11 | $3.26 |
| Furnace blower example | 500 W | 8.50¢ | $0.68 | $20.40 |
The furnace-blower row is only an example: blower power changes with motor type, airflow setting and duct resistance. Check the equipment label or measure it rather than assuming 500 W.
Worked example: fan cost per hour, overnight and 24 hours
A 50 W fan uses 0.05 kWh each hour. At $0.17 per kWh, that costs $0.0085, or 0.85 cents, per hour. Eight hours uses 0.4 kWh and costs $0.068 (about 7 cents). Running continuously for 24 hours uses 1.2 kWh and costs $0.204 (about 20 cents). Using it for 8 hours a day costs about $2.04 across 30 days or $6.12 across a 90-day summer.
A 100 W fan used on the same schedule costs exactly twice as much. Check the label near the motor or power cord for the rated watts; the speed setting can make actual usage lower than the label maximum.
What changes the cost most
Wattage, fan quantity, hours, days and your electricity rate affect cost in direct proportion. Doubling any one of them doubles the corresponding result. Fan type matters less than actual power and airflow: ENERGY STAR measures ceiling-fan efficiency in cubic feet per minute per watt, and publishes power at different speeds for certified models.
A fan cools people through air movement; it does not lower the room temperature. Turn it off in an empty room, and use a timer or smart plug if it tends to run after you fall asleep or leave.
Room fans and furnace blowers are different loads
A desk, box, tower or ceiling fan usually moves air within one room. A furnace or HVAC blower pushes air through ducts and can use several times more power, so a room-fan estimate should not be applied to the furnace fan.
For a furnace blower, enter the actual electrical watts and the hours the blower runs—not the furnace heat-input rating. Variable-speed blowers can change power as airflow demand changes, making a plug-in or whole-home energy measurement more reliable than a single nameplate estimate.
Sources used for assumptions: U.S. Department of Energy — ceiling-fan standards and scope; EPA ENERGY STAR — certified ceiling-fan efficiency and power fields; Honeywell — official HT-900 product details and manual.
Frequently asked questions
Is a fan cheaper than AC?
Dramatically — a fan might use 50 W while an AC unit uses 1,000+ W. For mild heat, a fan can cost 1–2% of running AC.
Does a fan actually cool a room?
It cools you, not the room, by helping sweat evaporate. Turn it off when you leave to avoid wasting power.
Tower vs pedestal vs ceiling?
Power and effectiveness vary, but all are cheap. Ceiling fans are efficient for whole-room air movement; check the wattage on yours.
How much does it cost to run a furnace fan?
It depends on the blower’s actual watts and run time. As an example, a 500 W blower running 8 hours at $0.17/kWh costs about $0.68 per day or $20.40 per 30 days. Variable-speed blowers may use much less at low airflow.
How much does a box fan cost to run all night?
A 75 W box fan running for 8 hours uses 0.6 kWh. At $0.17/kWh that is about $0.10 per night or $3.06 across 30 nights.
How much does a 50 W fan cost per hour?
At $0.17/kWh, a 50 W fan costs $0.0085 per hour, which is 0.85 cents. Multiply that by your actual hours, or enter your local rate above.
How much does it cost to run a fan for 24 hours?
A 50 W fan uses 1.2 kWh in 24 hours and costs about $0.20 at $0.17/kWh. A 75 W fan uses 1.8 kWh and costs about $0.31 at the same rate.
How much do two fans cost to run?
Multiply the watts per fan by two, then apply the same hours and electricity rate. For example, two 60 W fans running 8 hours use 0.96 kWh per day and cost about $0.16 per day at $0.17/kWh.
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