Convert CFM to CMM or reverse using the exact cubic-foot conversion factor, with results in cubic meters per second, cubic meters per hour, and liters.
Quick overview: CFM to CMM
CFM (cubic feet per minute) and CMM (cubic meters per minute) both measure volumetric airflow. The difference is simply the volume unit used: cubic feet versus cubic meters.
- 1 CFM ≈ 0.0283 CMM
- 100 CFM ≈ 2.83 CMM
- 500 CFM ≈ 14.16 CMM
- 1000 CFM ≈ 28.32 CMM
The converter uses the standard relation 1 ft³ = 0.0283168 m³, making it easy to compare fan, ventilation, and HVAC airflow specifications across imperial and metric systems.
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CFM to CMM Formula
The following formula is used to convert cubic feet per minute (CFM) into cubic meters per minute (CMM).
Variables:
- CMM is the airflow in cubic meters per minute
- CFM is the airflow in cubic feet per minute
- 0.0283168 is the conversion factor from cubic feet to cubic meters
To convert CFM to CMM, multiply the airflow value in cubic feet per minute by 0.0283168.
What is a CFM to CMM Conversion?
CFM to CMM conversion is the process of changing an airflow measurement from imperial units to metric units. CFM stands for cubic feet per minute, while CMM stands for cubic meters per minute. Both units describe how much air moves during one minute, but they use different volume systems. This conversion is commonly used in HVAC design, ventilation planning, exhaust fan sizing, and equipment specification comparisons.
Because one cubic foot equals approximately 0.0283168 cubic meters, the airflow value in CFM can be multiplied by this factor to determine the corresponding airflow in CMM.
How to Convert CFM to CMM?
The following steps outline how to convert CFM to CMM.
- First, determine the airflow rate in cubic feet per minute (CFM).
- Next, use the conversion factor 0.0283168 cubic meters per cubic foot.
- Multiply the CFM value by 0.0283168 to calculate the airflow in cubic meters per minute.
- After calculating the result, verify your answer using the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Airflow (CFM) = 250
Conversion Factor = 0.0283168
CMM = 250 × 0.0283168 = 7.0792
CFM to CMM Conversion Table
The table below lists several common airflow values in CFM and their corresponding CMM values using the formula CMM = CFM × 0.0283168.
| Airflow (CFM) | Factor (× 0.0283168) | Equivalent CMM |
|---|---|---|
| 50 CFM | 0.0283168 | 1.42 CMM |
| 100 CFM | 0.0283168 | 2.83 CMM |
| 250 CFM | 0.0283168 | 7.08 CMM |
| 500 CFM | 0.0283168 | 14.16 CMM |
| 750 CFM | 0.0283168 | 21.24 CMM |
| 1000 CFM | 0.0283168 | 28.32 CMM |
| 2000 CFM | 0.0283168 | 56.63 CMM |
In practice, manufacturers and engineering guides may list airflow in either CFM or CMM. By using the fixed volume conversion factor, you can quickly compare equipment, interpret specifications, and convert airflow requirements between imperial and metric systems.
