CFM to CMH Calculator
CFM to cubic metres per hour, shorthand CMH.
Enter your values
Enter the airflow in CFM.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- 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
At a glance
| What it does | CFM to cubic metres per hour, shorthand CMH. |
|---|---|
| Category | HVAC & Airflow |
| Inputs needed | Airflow |
| Main output | Airflow |
| Formula | CMH = CFM x 1.69901 |
| Cost | Free — no sign-up, no download |
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.
Inputs explained
- Airflow(CFM)
- Enter the airflow in CFM.
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.
What do I need to enter into the CFM to CMH Calculator?
Just 1 value: airflow. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the CFM to CMH Calculator work out the answer?
CMH is the same as m³/h, so one CFM equals 1.69901 CMH. It applies the formula CMH = CFM x 1.69901 and shows the working so you can check each step by hand.
Is the CFM to CMH Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.