AC vs Fan: Which Is Cheaper to Run?

Fans usually use much less electrical power than air conditioners, but they do not provide the same kind of cooling. A fan moves air and can improve how cool a person feels; an air conditioner removes heat from indoor air.

A simple cost comparison

Imagine a fan uses 60 watts and an air conditioner uses 1,200 watts.

For eight hours:

Fan: 0.06 kW × 8 = 0.48 kWh.

AC: 1.2 kW × 8 = 9.6 kWh.

At $0.16 per kWh, the simple energy cost would be about $0.08 for the fan and $1.54 for the AC.

But cost is not the only difference

A fan cannot lower room temperature in the same way an air conditioner can. It can make a person feel cooler by increasing evaporation and air movement. An air conditioner can lower indoor temperature and humidity, which may be important during very hot conditions.

When a fan can be useful

When indoor conditions are already reasonably comfortable, using a fan can provide a lower-energy way to improve perceived comfort. It can also complement an AC by allowing a higher thermostat setting while maintaining comfort, depending on the room and climate.

When AC provides something a fan cannot

If the indoor temperature is dangerously high, humidity is uncomfortable, or outdoor air is hotter than the desired indoor conditions, an air conditioner can perform a different function from a fan.

Calculate your own numbers

The wattage difference is easy to calculate with our Electricity Cost Calculator. Enter the wattage of each appliance separately and compare the daily and monthly estimates.

Bottom line

A fan and an air conditioner should not be treated as equivalent appliances. A fan typically consumes far less electricity, while an AC provides active cooling. The practical choice depends on the indoor conditions you need and the cost you are willing to pay for that level of cooling.