Ceiling-fan electricity cost calculator
Calculate what one or several ceiling fans cost to run per hour, month, cooling season, and year.
Worked calculation
A complete ceiling fan example
0.065 kW is multiplied by scheduled time and the 100% active-runtime assumption. The inputs are examples, not claims about every device. Replace each one with the label, meter reading, schedule, and tariff that apply to you.
Fan cost = fan watts ÷ 1,000 × hours × quantity × tariff65 W · 10 hours/day · 7 days/week · 100% active
- Monthly energy
- 19.7 kWh
- Monthly cost
- US$3.55
- Annual cost
- US$42.59
Transparent method
The calculation
Fan cost = fan watts ÷ 1,000 × hours × quantity × tariffFans are relatively stable loads, which makes wattage and runtime a useful planning model. Quantity matters when several rooms use fans simultaneously.
Read the full methodology →Sensitivity check
Run three scenarios.
Night useModel bedroom runtime only.
All-day warm weatherIncrease runtime during the cooling season.
Multiple roomsUse quantity to model simultaneous fans.
Use the result well
What can change the answer?
- Speed setting changes actual draw.
- Efficient DC-motor fans may use much less than older AC-motor models.
- Fans cool people, not empty rooms.
Calculation standards
Visible inputs. Reproducible results.
WhoPowerCost Lab's research desk maintains the formulas, market notes, and worked examples.
HowEnergy, tariff, and behavioural assumptions stay separate so readers can replace one input without hiding the others.
WhyThe page exists to answer an operating-cost decision. Advertising never changes a formula, default, or recommendation.