CMH to CFM Calculator
Cubic metres per hour to CFM.
Enter your values
ⓘ Live results
Results
- Airflow
- 294.3 CFM
- In L/s
- 138.9
- In CMM
- 8.33
- In CMH
- 500
Quick answer
One cubic metre per hour equals 0.588578 CFM.
CFM = CMH x 0.588578
How to use the CMH to CFM Calculator
- 1Enter the metric airflow in CMH.
- 2Read the CFM equivalent.
- 3Cross-check L/s if your code uses it.
Worked example
Using the values the calculator loads with:
Inputs
- Airflow500 CMH
Results
- Airflow294.3 CFM
- In L/s138.9
- In CMM8.33
- In CMH500
Frequently asked questions
Why do specs differ so much?
Free-air ratings ignore duct resistance; installed airflow is usually 20-40% lower.
Rounding?
Using 0.59 is accurate to within a fifth of a percent.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.