Exhaust Fan Operating Cost Calculator
Annual electrical operating cost of an exhaust fan.
Enter your values
Enter the fan power draw in W.
Enter the runtime in hours/day.
Enter the electricity rate in $/kWh.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Annual electrical cost
- $38.33
- Annual energy use
- 255.5 kWh
- Monthly cost
- $3.19
- 10-year cost
- $383
Quick answer
Annual exhaust fan electrical cost depends on wattage, runtime hours, and local electricity rate — a small continuous fan can still add up over a full year.
Cost = watts / 1000 x hours/year x $/kWh
At a glance
| What it does | Annual electrical operating cost of an exhaust fan. |
|---|---|
| Category | HVAC & Airflow |
| Inputs needed | Fan power draw, Runtime, Electricity rate |
| Main output | Annual electrical cost |
| Formula | Cost = watts / 1000 x hours/year x $/kWh |
| Cost | Free — no sign-up, no download |
How to use the Exhaust Fan Operating Cost Calculator
- 1Enter the fan's rated power draw in watts.
- 2Enter its typical daily runtime.
- 3Enter your electricity rate to see annual, monthly and 10-year operating cost.
Inputs explained
- Fan power draw(W)
- Enter the fan power draw in W.
- Runtime(hours/day)
- Enter the runtime in hours/day.
- Electricity rate($/kWh)
- Enter the electricity rate in $/kWh.
Worked example
Using the values the calculator loads with:
Inputs
- Fan power draw70 W
- Runtime10 hours/day
- Electricity rate0.15 $/kWh
Results
- Annual electrical cost$38.33
- Annual energy use255.5 kWh
- Monthly cost$3.19
- 10-year cost$383
Frequently asked questions
Do EC/ECM fans cost less to run?
Yes — electronically commutated motors typically use 50-70% less power than shaded-pole motors of similar CFM.
Should I include makeup air heating/cooling cost?
Use the spot exhaust energy cost calculator for that — this tool covers electricity only.
What do I need to enter into the Exhaust Fan Operating Cost Calculator?
Just 3 values: fan power draw, runtime, electricity rate. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Exhaust Fan Operating Cost Calculator work out the answer?
Annual exhaust fan electrical cost depends on wattage, runtime hours, and local electricity rate — a small continuous fan can still add up over a full year. It applies the formula Cost = watts / 1000 x hours/year x $/kWh and shows the working so you can check each step by hand.
Is the Exhaust Fan Operating Cost Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.