How Many kWh Does a Bathroom Exhaust Fan Use?
Bathroom Exhaust Fan energy cost calculator — see your exact daily, monthly, and yearly electricity cost.
US national average. Edit for your local rate.
Daily Energy Use
0.03
kWh / day
Monthly Cost
$0.17
Yearly Cost
$2.06
Bathroom Exhaust Fan — Cost Breakdown
| Period | kWh Used | Cost ($) |
|---|---|---|
| Per Hour | 0.0300 | $0.0056 |
| Per Day | 0.03 | $0.01 |
| Per Month (30 days) | 0.90 | $0.17 |
| Per Year (365 days) | 10.95 | $2.06 |
Running a bathroom exhaust fan for an hour uses about the same energy as charging a smartphone once.
3 Ways to Cut Your Bathroom Exhaust Fan Energy Bill
- 🌱
Install a humidity-sensing switch that turns the fan on and off automatically, preventing unnecessary runtime.
- 💡
Run the fan for only 20 minutes after showering — that's sufficient to remove moisture without wasting energy.
- ⚡
Upgrade to an Energy Star model — they use 60% less energy than standard fans while moving the same airflow.
The small fan motor draws a tiny surge of about 50–60W for a fraction of a second before settling to its low running wattage.