What this converter does
This converter turns cubic feet per minute into cubic metres per minute and back instantly. One CFM is 0.02832 CMM, so the two share the same per-minute time base and differ only by the foot-to-metre 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 2,000 CFM to CMM.
1 CFM = 0.0283168 CMM2,000 × 0.0283168 = 56.63 CMMSo 2,000 CFM equals about 56.6 CMM of airflow.
The units in this example
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
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