CFM to kW Calculator
Cubic feet per minute (CFM) to power in kilowatts (kW) is a handy conversion for exhaust fans and air compressors. This tool can convert your values like 30, 22, 75, 100 CFM to kilowatts.
Enter your values that you want to convert into the calculator and get results automatically. If you want to convert from kW to CFM, this calculator can also help you determine that.
CFM ↔ kW Converter
Contents
Leave any one field empty to calculate it:
Why To Convert A CFM Value To Kw?
Why would you need to convert from CFM to kW? Say you’re running a big manufacturing floor where large fans operate all day to keep air circulating and cool the place for machines and workers. Those fans consume a lot of electricity. One day, your boss walks over and asks, “Can we reduce our power bill?” Now you need to figure out if the fans are using energy efficiently or if there’s a better, more cost-effective option.
How To Calculate From CFM To Kw
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Airflow (CFM)
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Power usage (kW)
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System efficiency
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Electricity cost
All you need are the other three.
Calculation Example
You know your system pushes 2,500 CFM, runs at 65% efficiency, and electricity costs $0.12 per kWh. Now you’re thinking, “How much power is this thing using?” Just enter what you know, and the tool will calculate the power for you. Simple.
- 1: Formula to find kW
kW = (CFM × Cost per kWh) ÷ (Efficiency × 3412)
- 2: Plug in the numbers
kW = (2500 × 0.12) ÷ (0.65 × 3412)
- Step 3: Do the math
Top = 2500 × 0.12 = 300
Bottom = 0.65 × 3412 = 2217.8
kW = 300 ÷ 2217.8 = 0.1353
Final Result
The fan system uses 0.1353 kW, or about 135 watts. Now you can multiply that by hours and cost per kWh to get your daily or monthly expense.
Quick Overview
| Factor | What It Explains |
|---|---|
| CFM (Airflow) | Measures the volume of air moved per minute by the system |
| kW (Power) | Shows how much electrical power is used |
| Efficiency | Represents how well the system converts power into airflow |
| Cost Factor | Uses electricity rate to calculate energy expense |
| Main Use | Great for comparing fan performance and estimating energy costs |
| Useful For | Factories, warehouses, HVAC assessments, and energy-saving planning |
FAQs
1. What does this calculator do?
It converts airflow (CFM) into electrical power (kW), or vice versa, based on your system details.
2. Why convert CFM to kilowatts?
It helps you understand how much energy your fans or compressors are using and if they’re running efficiently.
3. What inputs are needed?
You’ll need the airflow in CFM, system efficiency, and electricity cost per kWh.
4. Can it help reduce energy bills?
Yes, by comparing current usage and finding more efficient systems, you can lower your energy costs.
