cfm to m3/sec Converter

Enter the flow value and choose the conversion direction to determine the equivalent volumetric flow rate in cfm or m³/s.

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CFM to m³/s Formula

The following formulas are used to convert volumetric flow rates between cubic feet per minute (cfm) and cubic meters per second (m³/s).

Q(m³/s) = Q(cfm) × 0.00047194745

Q(cfm) = Q(m³/s) ÷ 0.00047194745

Variables:

• Q(m³/s) is the flow rate in cubic meters per second
• Q(cfm) is the flow rate in cubic feet per minute
• 0.00047194745 is the conversion factor from cfm to m³/s

To convert from cfm to m³/s, multiply the flow rate by 0.00047194745. To convert from m³/s to cfm, divide the flow rate by 0.00047194745.

What is CFM to m³/s Conversion?

This conversion changes a volumetric flow rate from cubic feet per minute to cubic meters per second, or vice versa. cfm is commonly used in HVAC specifications, ventilation systems, and fan ratings in the United States, while m³/s is the standard SI unit used in many engineering and technical references worldwide.

The conversion comes from changing cubic feet to cubic meters and minutes to seconds. Since 1 ft³ = 0.0283168466 m³ and 1 minute = 60 seconds, 1 cfm is equal to approximately 0.00047194745 m³/s.

This relationship is useful when comparing international equipment data, reviewing ventilation requirements, or converting design values between unit systems.

How to Calculate CFM to m³/s?

The following steps outline how to convert cfm to m³/s or m³/s to cfm.

1. First, determine the flow rate value you want to convert.
2. If the value is in cfm, multiply it by 0.00047194745 to convert to m³/s.
3. If the value is in m³/s, divide it by 0.00047194745 to convert to cfm.
4. After calculating the result, verify your answer with the calculator above.

Example Problem:

Convert 500 cfm to m³/s.

Q(m³/s) = 500 × 0.00047194745 = 0.23597

So, 500 cfm is approximately 0.23597 m³/s.

As another example, 0.25 m³/s is approximately 529.72 cfm.

CFM to m³/s Conversion Table

The table below shows several common conversions using the factor 1 cfm ≈ 0.00047194745 m³/s.

Remembering this conversion factor makes it easier to compare fan curves, validate airflow requirements, and interpret HVAC or process data reported in different unit systems.