How Much Does It Cost to Run a Ceiling Fan?
About $4.32 a month — 1.2¢ an hour — for a standard 52", 75-watt fan run 12 hours a day at the 2024 US average rate of $0.16/kWh. Across a whole 150-day cooling season it costs $21.60, against $672 for central air conditioning. Set your own fan and rate below.
On high speed. Check the label on the fan or its box — that number beats any estimate.
Count only the hours somebody is in the room. A fan in an empty room cools nobody.
The 2024 US average is $0.16. Hawaii is over triple it.
Fan size
Fans running (1)
Ceiling fan electricity cost per month
$4.32
27.0 kWh at $0.16/kWh — $51.84 a year if you ran it every day, or $21.60 across a 150-day cooling season.
Cost per hour
1.2¢
75W × $0.16/kWh
Energy per day
0.90 kWh
12 h/day on one fan
Pays for itself if it saves
15 min
a day of central ac runtime — 3% of its 8 h
0.075 kW × 12hours × 30 days × $0.16 = $4.32. The fan itself is almost never the story — what it does to your thermostat is.
Compare against
A 3,500W central ac (3-ton system, whole house) costs 56.0¢ an hour against your fan's 1.2¢, and $672.00 across the same 150-day season your fan costs $21.60. So the fan wins its own electricity back the moment it lets the compressor rest 15 minutes a day — 3% of the 8 hours it runs. Below that, the fan is costing you money.
DOE does not publish ceiling fan wattages — its efficiency standard is written in airflow per watt, not watts — so the size presets above are typical nameplate values, not a federal statistic. Use the number on your fan. Air conditioner figures are the anchor examples from our window AC and central AC pages, at 8 hours of daily compressor runtime. Not sure of your rate? Check average rates by state.
Ceiling fan wattage by fan size
Monthly cost = watts ÷ 1,000 × hours per day × 30 × price per kWh
A ceiling fan is one of the few appliances where this arithmetic is the whole truth. There is no compressor cycling on and off, no thermostat, no standby draw worth measuring — a fan pulls very nearly its rated watts the entire time it spins.
Worked example (52" fan, 75W, 12 hours a day, $0.16/kWh): 75 ÷ 1,000 = 0.075 kW × 12 hours = 0.9 kWh a day × 30 days = 27kWh × $0.16 = $4.32 per month.
Why nobody can tell you your fan's wattage
The Department of Energy sets an efficiency standard for ceiling fans, but it is written in airflow efficiency — cubic feet per minute of air moved per watt drawn — and not in watts. That is deliberate: watts alone say nothing about whether a fan is any good. Two 52" fans can both draw 75W and move very different amounts of air, and the better one is the one that moves more. So no federal table of ceiling fan wattages exists, and any page that presents one as an official statistic is inventing it. The ranges below are what you will find on the nameplates of fans sold today. The number on your fan's label beats every one of them.
Typical wattage and monthly cost by blade span
Wattage is on high speed. Cost assumes 12 hours a day at $0.16/kWh, and is shown as a range because the wattage is one.
| Fan size | Blade span | Watts on high | kWh per month | Cost per month | Cost per season |
|---|---|---|---|---|---|
| SmallHuggers, small bedrooms, hallways | 29-36" | 15–30W | 5.4–10.8 | $0.86–$1.73 | $4.32–$8.64 |
| MediumBedrooms, offices, dining rooms | 42-48" | 30–55W | 10.8–19.8 | $1.73–$3.17 | $8.64–$15.84 |
| StandardThe size most American homes have | 52" | 55–90W | 19.8–32.4 | $3.17–$5.18 | $15.84–$25.92 |
| LargeGreat rooms, high ceilings, patios | 56-60"+ | 80–100W | 28.8–36.0 | $4.61–$5.76 | $23.04–$28.80 |
| DC motor, 52"Same size, different motor | 52" | 17–27W | 5.9–9.7 | $0.95–$1.56 | $4.75–$7.78 |
The DC row is not a separate measurement — it is the 52" row scaled by the 70% figure UC Berkeley's Center for the Built Environment gives for DC versus AC motors on small-diameter fans. Separately, ENERGY STAR certified ceiling fans are up to 44% more efficient than conventional models.
Monthly cost by hours and electricity rate
For the baseline 75W fan. Rows are common US electricity rates; columns are hours a day. Even in the most expensive corner of this table, a ceiling fan is a rounding error on a summer bill.
| Rate ($/kWh) | 4h/day | 8h/day | 12h/daybaseline | 24h/daycontinuous |
|---|---|---|---|---|
| $0.10 | $0.90 | $1.80 | $2.70 | $5.40 |
| $0.13 | $1.17 | $2.34 | $3.51 | $7.02 |
| $0.16 (US avg) | $1.44 | $2.88 | $4.32 | $8.64 |
| $0.22 | $1.98 | $3.96 | $5.94 | $11.88 |
| $0.33 | $2.97 | $5.94 | $8.91 | $17.82 |
Find your own rate on the rates by state page. Fans draw meaningfully less on lower speeds — DOE's own test procedure measures fans at both low and high speed rather than assuming one number — so if yours lives on medium, treat these as an upper bound.
Cost to run a ceiling fan vs AC all summer
Over a 150-day cooling season — roughly May through September — here is what each machine costs at $0.16/kWh. The air conditioner figures are the anchor examples from our window AC and central AC pages, at 8 hours of daily compressor runtime.
| Machine | Draw | Hours/day | Cost per hour | Cost per month | Cost per 150-day season |
|---|---|---|---|---|---|
| Ceiling fan52", the size most american homes have | 75W | 12 | 1.2¢ | $4.32 | $21.60 |
| Window AC8,000-10,000 BTU, one room | 1,000W | 8 | 16.0¢ | $38.40 | $192.00 |
| Central AC3-ton system, whole house | 3,500W | 8 | 56.0¢ | $134.40 | $672.00 |
“Hours” for an air conditioner means compressor runtime, not hours the thermostat is set to cool; real bills vary with weather and insulation. The fan runs longer than the AC here because that is how fans are actually used — and it still costs a fraction as much.
A whole summer of fan costs about 5 days of central AC
$21.60 against $672 — the air conditioner costs 31 times as much across the same season, so the fan's entire 150 days cost what the compressor spends in 5 of them. Per hour running, the gap is starker still: you could spin 47 ceiling fans for the electricity that central air conditioner draws in one hour. Against a window unit the ratio is smaller but the conclusion is the same, $21.60 against $192.
But a fan cannot replace an air conditioner
This is where the comparison stops being a comparison. An air conditioner removes heat from a room. A ceiling fan does not, and cannot — it only stirs the air, and every watt its motor draws turns into heat inside the same room. What it does is move air across your skin, which speeds evaporation and makes youfeel cooler while the room stays exactly as warm. The Department of Energy puts it plainly: ceiling fans cool people, not rooms. So the honest question is never “fan or AC?” It is “how much AC does the fan let me skip?”
Do ceiling fans save money?
Only if you touch the thermostat. Run a fan and leave the thermostat where it was and you have simply added $4.32a month to your bill — and given your air conditioner a little more heat to remove, since the fan's 75 watts end up in the room. Raise the thermostat and the arithmetic inverts, because the bar is so low.
The break-even: 15 minutes a day
The 75W fan running 12 hours uses 0.9 kWh a day. A 3,500W central air conditioner burns that same 0.9 kWh in 15 minutes. So the fan has paid for its own electricity the moment it lets the compressor rest 15 minutes a day — about 3% of the 8 hours it runs. Every minute beyond that is profit.
Against a 1,000W window unit the bar is higher, because the unit is smaller: the fan must save 54 minutes a day, or 11% of its runtime. Still a low bar. Notice what this calculation does not require: any assumption about what a degree of thermostat is worth.
What is 4°F actually worth? Nobody credible will tell you
The Department of Energy says a ceiling fan “will allow you to raise the thermostat setting about 4°F with no reduction in comfort.” What it does not say — and what no federal source we could find says — is how much cooling cost that 4°F saves. You will see “3% per degree” repeated across the internet, usually attributed to DOE. DOE does not publish it, and we could not source it to anyone. It is not on this page.
What DOE does publish is the nearest scale reference: you can save as much as 10% a year on heating and cooling by setting the thermostat back 7-10°F for 8 hours a day. That describes an empty house, not a fan-cooled occupied one, so do not take it as your answer. Take it as an order of magnitude — and set it against a break-even of 3%. A 4°F setback that bought only 3% less compressor runtime would be a remarkably poor one. Your house, your climate and your insulation decide the rest.
Turn it off when you leave
DOE's advice, verbatim in spirit: fans cool people, not rooms. A fan spinning in an empty room warms it very slightly and cools nobody, at 1.2¢ an hour. This is the only ceiling fan tip that saves 100% of a cost.
Raise the thermostat, or skip the fan
A fan under an unchanged thermostat is pure added cost. The whole saving lives in the 4°F. If you are not going to move the setpoint, you are paying $21.60 a season for air movement you may or may not want.
Run it counterclockwise in summer
The downdraft is what creates the wind-chill effect on skin. Reversed, the fan pulls air up and you lose most of the cooling sensation you are paying for — the same watts, none of the benefit.
Use a lower speed
Fan power falls off steeply as speed drops, far faster than the airflow does. DOE tests fans at low and high speed for exactly this reason. If medium keeps you comfortable, the table above is an upper bound on what you are spending.
Do not replace a working fan to save
A DC motor uses about 70% less energy, which sounds enormous until you apply it: $4.32 a month becomes $1.30. Worth having in a new fan. Never worth buying one for.
Go find the real money
Your fan costs $51.84 a year. Your air conditioner costs $672 in one summer. Our energy savings guide goes room by room through the loads that actually move a bill.
Related Guides
Cost to Run a Window AC
$192 a season — what the fan is helping you avoid
Cost to Run a Central AC
$672 a season, and where the 4°F pays off
How to Save on Energy Bills
Practical tips by room with savings
Ceiling Fan Cost Calculator
Quick watts-and-hours estimate on the main tool
Electricity Rates by State
Your rate, not the national average
Biggest Energy Wasters in Summer
Where the fan ranks against everything else
Frequently Asked Questions
How much does a ceiling fan cost to run?
About $4.32 a month. A standard 52" ceiling fan draws roughly 75 watts on high, so running it 12 hours a day uses 0.9 kWh a day — 27 kWh a month — which at the 2024 US average rate of $0.16/kWh comes to $4.32. That is 1.2¢ an hour, or $51.84 if you left it running every day of the year.
How many watts does a ceiling fan use?
Between about 15 and 100 watts on high speed, depending on size: 29-36" fans draw around 15-30W, 42-48" fans draw around 30-55W, 52" fans draw around 55-90W, 56-60"+ fans draw around 80-100W. There is no official table of these numbers — the Department of Energy's efficiency standard for ceiling fans is written in airflow per watt (cubic feet per minute of air moved per watt drawn), not in watts, because wattage alone says nothing about how much air a fan actually moves. The only wattage that is true for your fan is the one on its label or box.
Is it cheaper to run a ceiling fan or the air conditioner?
The fan, by a wide margin — but they do different jobs. Across a 150-day cooling season, the 75W fan costs $21.60 while a 3,500W central air conditioner running 8 hours a day costs $672, about 31 times as much. You could run 47 ceiling fans for what that air conditioner costs per hour. The catch is that a fan does not cool a room. It cools people, by moving air across skin, so it cannot replace air conditioning — it can only let you set the thermostat higher.
Do ceiling fans save money?
Only if you raise the thermostat. A fan running under an unchanged thermostat setting is pure added cost, and the air conditioner then has to remove the fan motor's heat as well. But the bar for saving money is remarkably low: the 75W fan run 12 hours a day uses 0.9 kWh, which a 3,500W central AC burns in about 15 minutes. So the fan pays for its own electricity the moment it lets the compressor rest 15 minutes a day — roughly 3% of the 8 hours it runs. The Department of Energy says a ceiling fan lets you raise the thermostat about 4°F with no reduction in comfort.
Does leaving a ceiling fan on all day waste electricity?
In an empty room, entirely. A ceiling fan does not lower the air temperature — every watt its motor draws ends up as heat in the room, so a fan running with nobody there leaves the room very slightly warmer than it found it, at a cost of 1.2¢ an hour. The Department of Energy's guidance is direct: ceiling fans cool people, not rooms, so turn the fan off when you leave the room. The saving is small in absolute terms — $4.32 a month is not what is wrong with your bill — but it is a saving of 100% of a cost that buys you nothing.
Do DC ceiling fans use less electricity?
Substantially. UC Berkeley's Center for the Built Environment reports that a DC motor often uses about 70% less energy than an AC motor on small-diameter fans. Applied to our 75W baseline that is roughly 23W, or $1.30 a month instead of $4.32 — a saving of $3.02 a month. Separately, ENERGY STAR certified ceiling fans are up to 44% more efficient than conventional models. Both figures are worth having, and neither is worth replacing a working fan over: the whole annual cost of the fan you own is $51.84.
How much does it cost to run a ceiling fan for 24 hours?
About $0.29 for a 75W fan at $0.16/kWh — 1.8 kWh of electricity. Over a 30-day month of continuous running that is $8.64. Running it around the clock costs twice what running it 12 hours a day does, and unless somebody is in the room around the clock, the second half of that is buying nothing.