CFM to CMH Calculator
CFM to cubic metres per hour, shorthand CMH.
Enter your values
ⓘ Live results
Results
- Airflow
- 424.8 CMH
- In L/s
- 118
- In CMM
- 7.079
- In CFM
- 250
Quick answer
CMH is the same as m³/h, so one CFM equals 1.69901 CMH.
CMH = CFM x 1.69901
How to use the CFM to CMH Calculator
- 1Enter the CFM rating.
- 2Read CMH to match metric fan data sheets.
- 3Use CMM when comparing small inline fans.
Worked example
Using the values the calculator loads with:
Inputs
- Airflow250 CFM
Results
- Airflow424.8 CMH
- In L/s118
- In CMM7.079
- In CFM250
Frequently asked questions
Is CMH different from m³/h?
No — CMH is just shorthand for cubic metres per hour.
Which is bigger?
One CMH is smaller than one CFM; 1 CFM is about 1.7 CMH.
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.