Enter a flow value and choose the conversion direction into the calculator to determine the equivalent airflow in cubic meters per hour (m³/h) or cubic feet per minute (CFM).
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m³/h to CFM Formula
The following formulas are used to convert cubic meters per hour (m³/h) to cubic feet per minute (CFM) and back again.
CFM = m³/h × (35.3147 / 60) ≈ m³/h × 0.5885778
m³/h = CFM × (60 / 35.3147) ≈ CFM × 1.6990108
Variables:
- CFM is the airflow in cubic feet per minute
- m³/h is the airflow in cubic meters per hour
- 35.3147 converts cubic meters to cubic feet
- 60 converts hours to minutes
To convert m³/h to CFM, multiply the flow rate by 0.5885778. To convert CFM to m³/h, multiply the flow rate by 1.6990108.
What is m³/h to CFM Conversion?
m³/h and CFM are both units of volumetric airflow. The difference is that m³/h uses metric units and measures cubic meters per hour, while CFM uses imperial units and measures cubic feet per minute. Because the units differ in both volume and time, a fixed conversion factor is used to move between the two. This is common in HVAC, ventilation, duct sizing, fan selection, and airflow reporting.
How to Convert m³/h to CFM?
The following steps outline how to convert between m³/h and CFM.
- First, determine the airflow value you want to convert.
- Next, identify the direction of conversion: m³/h to CFM or CFM to m³/h.
- If converting m³/h to CFM, multiply the value by 0.5885778.
- If converting CFM to m³/h, multiply the value by 1.6990108.
- After inserting the values and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Flow Rate = 100 m³/h
Conversion Direction = m³/h to CFM
Converted Flow = 58.8578 CFM
m³/h to CFM Conversion Table
The table below lists several common airflow values in m³/h and their equivalent values in CFM.
| Flow in m³/h | Equivalent in CFM |
|---|---|
| 50 m³/h | 29.43 CFM |
| 100 m³/h | 58.86 CFM |
| 200 m³/h | 117.72 CFM |
| 500 m³/h | 294.29 CFM |
| 1,000 m³/h | 588.58 CFM |
Understanding this relationship makes it easier to compare fan ratings, ventilation requirements, and airflow specifications across metric and imperial systems.