Enter the flow value and select the conversion direction to convert between cubic feet per minute (CFM) and cubic meters per hour (m³/h).

CFM to m³/h Converter

Enter a flow value and choose the conversion direction

Quick Overview: CFM to m³/h

Both CFM and m³/h describe how much air or gas moves through a system over time. CFM is based on cubic feet per minute, while m³/h uses cubic meters per hour.

  • 1 CFM = 1.6990108 m³/h
  • 1 m³/h ≈ 0.58858 CFM
  • 10 CFM ≈ 16.99 m³/h
  • 100 CFM ≈ 169.90 m³/h
  • 500 CFM ≈ 849.51 m³/h

The calculator automatically applies the fixed conversion factor once you enter the flow value and choose the conversion direction.

CFM to m³/h Formula

The following formulas are used to convert between cubic feet per minute (CFM) and cubic meters per hour (m³/h).

m^3/h = CFM \times 1.6990108
CFM = \frac{m^3/h}{1.6990108}

Variables:

  • CFM is the flow rate in cubic feet per minute
  • m³/h is the flow rate in cubic meters per hour
  • 1.6990108 is the fixed conversion factor between the two units

To convert CFM to m³/h, multiply the CFM value by 1.6990108. To convert m³/h to CFM, divide the m³/h value by 1.6990108.

What is CFM to m³/h Conversion?

Both CFM and m³/h measure volumetric flow rate, which is the amount of air or gas moving through a system over time. CFM is commonly used in HVAC, ventilation, and fan specifications in the United States, while m³/h is the SI-based unit often used in international technical documentation and engineering calculations.

Because the units use different base length measurements and different time intervals, a constant conversion factor is required. Using the exact relationship between feet and meters, 1 CFM equals 1.6990108 m³/h.

How to Convert CFM to m³/h?

The following steps outline how to convert between CFM and m³/h.

  1. First, determine the airflow value you want to convert.
  2. Next, identify whether the value is given in CFM or in m³/h.
  3. If converting from CFM to m³/h, multiply the value by 1.6990108.
  4. If converting from m³/h to CFM, divide the value by 1.6990108.
  5. Check your answer with the calculator above.

Example Problem:

Use the following values as example problems to test your knowledge.

Example 1: Flow = 250 CFM

m³/h = 250 × 1.6990108 = 424.7527 m³/h

Example 2: Flow = 1000 m³/h

CFM = 1000 ÷ 1.6990108 = 588.5778 CFM

CFM to m³/h Conversion Table

The following table lists common airflow values in CFM alongside their equivalents in m³/h.

Flow (CFM) Flow (m³/h)
10 16.99 m³/h
20 33.98 m³/h
50 84.95 m³/h
100 169.90 m³/h
200 339.80 m³/h
500 849.51 m³/h

Knowing how to convert between CFM and m³/h makes it easier to compare fans, pumps, blowers, and ventilation systems even when different unit systems are used in product specifications.