How many watts does a ceiling fan use?
A ceiling fan uses about 30 watts on high and about 3 watts on low — a ninefold difference decided by the pull-chain.
Both are medians of 1,444 fans certified by ENERGY STAR. The gap is the point: the figure almost every page quotes is the top speed, and very little of a fan's running life is spent there.
- How much electricity does a ceiling fan use per hour?
- Between 3 and 30 watts while running, so roughly 0.02 kWh an hour at the middle of that range. At 30¢ per kWh that is about 0.51¢ an hour.
- How much electricity does a ceiling fan use in 24 hours?
- Left on for a full 24 hours it uses about 0.41 kWh. That is a different question from a typical day, which for most households is far fewer hours — the two answers differ by several times.
- How much electricity does a ceiling fan use when off?
- On standby it draws 0.4 to 1.4 watts. Small per hour, but it runs every hour of the year, which is why standby is worth counting separately from use.
Work it out with your own tariff
Residential sector, US average, as published in Electric Power Monthly released 26 August 2026. This is a revenue-weighted average across all residential customers and utilities, not a tariff any single household pays. In the same month the state residential averages (table 5.6.A) ran from 14.37 cents in Idaho to 52.72 in Hawaii, with California at 34.74 and New York at 29.49 — a spread of more than three and a half times. Use the figure from your own bill; the default here is a placeholder, not an answer.
| Period | Electricity | Cost | Hours counted |
|---|---|---|---|
| One hour running | 0.02 kWh | $0.01 | 1 hour |
| A full 24 hours on | 0.41 kWh | $0.12 | 24 hours |
| A day of typical use | 0.10 kWh | $0.03 | 6 hours |
| A month | 3.1 kWh | $0.92 | 6 h/day × 30 |
| A year | 37.2 kWh | $11 | 6 h/day × 365 |
17 W × 6 h ÷ 1000 = 0.10 kWh × 30¢ = $0.03 for a day of typical use.
Calculated at 17 W, the middle of the 3–30 W range. Rate defaults to 18.34¢ (U.S. Energy Information Administration, June 2026) — a national average, which is wrong for you specifically, so put your own in above.
The number is the speed, not the fan
Medians across 1,444 certified ceiling fans, measured under the ENERGY STAR procedure.
| Running at | Median draw | Middle half of models |
|---|---|---|
| High speed | 29.7 W | 24-36 W |
| Low speed | 3.4 W | 2.6-4.8 W |
| Standby, blades stopped | 0.9 W | 0.4-1.4 W |
Between low and high the draw moves about ninefold, on the same fan, chosen by the pull-chain. Almost every page that answers "how many watts does a ceiling fan use" gives you the high-speed figure and stops there. A fan turned down and left on overnight is costing roughly a ninth of what that headline number implies.
What the two speeds cost
At 18.34 cents a kilowatt-hour, the price this site uses throughout.
| Speed and hours | A year | Cost |
|---|---|---|
| High, 8 hours a day | 87.6 kWh | about $16 |
| Low, 8 hours a day | 8.8 kWh | about $1.60 |
| High, all day and night | 263 kWh | about $48 |
An hour of a fan on high is just over half a cent. That is the honest scale of it: a ceiling fan is a cheap machine to run, and the reason to care about the speed is not the money on any one fan but the habit of leaving the fast setting on when the slow one would do.
A fan is not a small air conditioner — it is a different machine
This is the comparison people actually want, and it is easy to get wrong. A ceiling fan on high draws about 30 watts; a window air conditioner, while its compressor runs, draws several hundred — it has its own page on this site with the certified figures.
But a fan does not lower the temperature. It moves air, and moving air carries heat off skin. In a room with nobody in it a fan changes nothing except the meter. That is why the saving from a fan is conditional and not automatic: it lets you raise the thermostat, or skip the air conditioner, while you are in the room to feel it. Left running in an empty one it is pure cost, small as it is.
The remote is drawing a watt while the fan is off
A fan with a remote or a smart control keeps that receiver awake to listen for the signal, and across certified models that runs about 0.9 watts with the blades stopped. Held all year, 0.9 W is about 8 kWh — roughly $1.50, and there every hour the fan is "off". A fan on a plain wall switch draws nothing when off; the standby number is the price of the convenience, not of the fan.
Efficiency is airflow per watt, and it varies more than the watts do
The watts barely move: nearly every certified fan sits between 24 and 36 on high. What varies is how much air those watts move. ENERGY STAR reports airflow efficiency in cubic feet per minute per watt, and across the same 1,444 fans it runs from about 169 to 246 CFM/W between the quartiles — the better half move close to half again as much air per watt as the worse. The lever is the motor: a DC motor moves more air per watt than an AC one, and the certified list is where that difference shows up as a number instead of a marketing line.
What this does not account for
These are certified fans, and that is a biased sample. ENERGY STAR is voluntary and efficient fans earn it. An older builder-grade fan with an AC motor draws noticeably more than the certified median, because an AC motor is less efficient than the DC motors that dominate this list. If yours is not certified, the number moves up.
The light kit is not in these watts. The figures are the fan motor alone. A fan's light kit draws its own power, counted separately by ENERGY STAR; on an LED kit that is a few watts more while the light is on.
A fan does not cool the room. It moves air, which cools skin. The electricity is only worth spending while someone is there to feel it — a fan running in an empty room is cost with no return, however small.
Low and high are the certified speeds, not a promise about yours. Fans differ in how many speeds they have and where the middle ones fall between these two ends. The band here is the two ends measured under the procedure.
Standby needs the fan to have a receiver. The 0.9 W is for fans with a remote or smart control; a fan on a wall switch has no standby draw at all.
This is electricity only, at 18.34 cents a kilowatt-hour. Your rate is on your bill, and the calculator above takes it.
Sources
- 01ENERGY STAR Certified Ceiling Fans — fan power consumption at low speed, high speed and standby (Version 4.0)U.S. Environmental Protection Agency ·
- 02Electric Power Monthly, Table 5.3 — average price of electricity to ultimate customersU.S. Energy Information Administration ·
How these figures are produced: see our methodology.
Figures are calculated from published wattages and a published tariff, both dated above. They are good for comparing devices, not for predicting your bill: your rate, settings and usage all differ.