What this converter does
This converter turns cubic metres per minute into cubic feet per minute and back instantly. One CMM is 35.31 CFM, sharing the same per-minute time base and differing only by the metre-to-foot volume ratio. Type a value and read it as you type.
It also covers m³/h and litres per second. For the hourly metric rate, see the CFM to m³/h converter.
The units it covers
Both are volumetric airflow rates with a fixed value in cubic metres per second, so the conversion is a single multiplication.
View all units & their values
| Unit | Symbol | Value | Mainly used |
|---|---|---|---|
| Cubic foot per minute | CFM | 0.0004719 | US fan and duct ratings |
| Cubic metre per minute | CMM | 0.01667 | Large-volume metric airflow |
| Cubic metre per hour | m³/h | 0.0002778 | Metric fan ratings |
| Litre per second | L/s | 0.001 | Metric ventilation rates |
The formula
Each unit has a fixed value in cubic metres per second, so converting between any two is one step:
result = value × factor_from ÷ factor_toWhere:
- value = the number you typed
- factor_from = the “from” unit’s value in m³/s
- factor_to = the “to” unit’s value in m³/s
Worked example
Convert 50 CMM to CFM.
1 CMM = 35.3147 CFM50 × 35.3147 = 1,765.7 CFMSo 50 CMM equals about 1,766 CFM of airflow.
The units in this example
A metric airflow rate on the same per-minute base as CFM, used for large-volume flow.
- 1 CMM = 35.31 CFM
- 1 CMM = 60 m³/h
- 1 CMM = 16.67 L/s
- 10 CMM = 353.1 CFM
The US airflow rate, standard for fan and duct ratings.
- 1 CFM = 0.02832 CMM
- 1 CFM = 1.699 m³/h
- 1 CFM = 0.4719 L/s
- 100 CFM = 2.832 CMM