Airflow is either measured in meter cube per hour (m3/h) or CFM. CFM or cubic feet per minute is usually the more useful metric. However, specification sheets of some devices like air purifiers may include m3/h but not CFM. That’s why it’s useful to convert m3/h to CFM.
To help you out, we have created an m3/h to CFM calculator (just insert m3/h, get CFM automatically). Below the calculator, you will also find a conversion chart with 1 m3/h to 3000 m3/h converted into CFM
Here are the units that we are converting:
- m3/h or CMH (Cubic Meters Per Hour) is the SI unit of air flow. 1 m3/h is equal to 1 cubic meter of air being moved in 1 hour.
- CFM stands for Cubic Foot Per Minute. This is also a unit of air flow; 1 CFM is equal to 1 cubic foot of air being moved in 1 hour.
How do you convert m3/hr to CFM?
As you can see, we have to make two conversions:
- Covert m3 into ft3 (cubic meter to cubic feet). 1 m3 is equal to 35.3147 ft3.
- Convert hours to minutes. 1 hour is equal to 60 minutes.
With a bit of math, we can derive this formula to convert m3/h to CFM:
CFM = m3/h / 1.699
Example: An air purifier can produce an air flow of 200 m3/h. We just insert this 200 m3 into the equation like this:
CFM (200 m3/h) = 200 m3/h / 1.699 = 117.72 CFM
We can also use this basic conversion:
1 m3/h is equal to 0.589 CFM.
To help you out, we have prepared a meter cube per hour to CFM calculator:
m3/h To CFM Calculator
Just input the m3/hr and you’ll get the converted CFM value. Below the calculator, we have also calculated a conversion chart for the most common airflow rates.
Here is how this calculator works:
Let’s say we want to convert 100 m3/h to CFM. Just slide the slider to ‘100’ and you get the result: 100 m3/h is equal to 58.86 CFM.
Note: m3/hr can also be abbreviated as CHM. That means that CHM to CFM conversion is the same as meter cube per hour to CFM, ie: 1 CHM is equal to 0.589 CFM.
Here is the full m3/h to CFM conversion chart:
Meter Cube Per Hour To CFM Conversion Chart
| m3/h (Cubic Meters per Hour or CMH): | CFM (Cubic Feet Per Minute): |
| 1 m3/h | 0.589 CFM |
| 5 m3/h | 2.95 CFM |
| 10 m3/h | 5.89 CFM |
| 20 m3/h | 11.77 CFM |
| 30 m3/h | 17.67 CFM |
| 40 m3/h | 23.56 CFM |
| 50 m3/h | 29.45 CFM |
| 60 m3/h | 35.34 CFM |
| 70 m3/h | 41.23 CFM |
| 80 m3/h | 47.12 CFM |
| 90 m3/h | 53.01 CFM |
| 100 m3/h | 58.90 CFM |
| 150 m3/h | 88.35 CFM |
| 200 m3/h | 117.80 CFM |
| 250 m3/h | 147.25 CFM |
| 300 m3/h | 176.70 CFM |
| 350 m3/h | 206.15 CFM |
| 400 m3/h | 235.60 CFM |
| 450 m3/h | 265.05 CFM |
| 500 m3/h | 294.50 CFM |
| 600 m3/h | 353.40 CFM |
| 700 m3/h | 412.30 CFM |
| 800 m3/h | 471.20 CFM |
| 900 m3/h | 530.10 CFM |
| 1000 m3/h | 589.00 CFM |
| 1500 m3/h | 883.50 CFM |
| 2000 m3/h | 1178.00 CFM |
| 3000 m3/h | 1767.00 CFM |
Now you can just check this chart for this conversion. Example: How many CFM is 450 m3/h? As you can see from the chart, 450 m3/h is equal to 265.05 CFM.
With the calculator and this chart, you are fully equipped to adequately and precisely convert m3/h to CFM. If you need specific conversion from m3/hr to CFM, you can give us the numbers in the comments below and we’ll try to help you out.
1 cfm= cubic foot/minute.
1 cfm= 60/35.2875 cubic meter per hour 1 cubic meter = 35.2965 cubic foot
1 cfm = 1.7 CMH 1 hrs = 60 minutes
CFM= 1.7 CMH
ducted fan coil 18.3 kw cooling capacity convert cmh is how many air flow
Hi Joseph, alright, the general rule of hand is that you need 400 CFM per ton of cooling. If we convert 18.3 kW to tons with this converter, we get 18.3 kW = 5.20 Tons. That would yield an airflow of 400 CFM/Ton × 5.2 Tons = 2080 CFM. That would be 3534 CHM. Hope this helps.