🌡️ Climate Control
How Many kWh Does a Box Fan Use?
Box Fan energy cost calculator — see your exact daily, monthly, and yearly electricity cost.
Rate — APRIL 2026
⚡ 75W typical
$
US national average. Edit for your local rate.
Daily Energy Use
0.75
kWh / day
Monthly Cost
$4.24
Yearly Cost
$51.55
Box Fan — Cost Breakdown
| Period | kWh Used | Cost ($) |
|---|---|---|
| Per Hour | 0.0750 | $0.0141 |
| Per Day | 0.75 | $0.14 |
| Per Month (30 days) | 22.50 | $4.24 |
| Per Year (365 days) | 273.75 | $51.55 |
⚡ Real-World Comparison
Running a box fan for 10 hours uses about the same energy as running a microwave for 15 minutes.
3 Ways to Cut Your Box Fan Energy Bill
- 🌱
Place it in a window at night blowing inward to pull in cool evening air, then switch to exhaust in the morning.
- 💡
Clean the blades and grills regularly — a dusty box fan can lose up to 20% of its airflow capacity.
- ⚡
Run two fans creating cross-ventilation rather than one fan on high — it moves more total air at similar wattage.
Startup Surge Information
The simple induction motor draws a brief surge of roughly 150W at startup before settling to its running wattage.