CFM to m³/h Converter
Convert cubic feet per minute (CFM) to cubic metres per hour (m³/h). One cubic foot is 0.0283168 m³ and an hour is 60 minutes, so 1 CFM = 1.69901 m³/h. This is the conversion for reading a US fan, air handler or extractor rating against a metric ventilation specification.
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CFM to m³/h conversion resultFree download
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How It Works
CFM is the airflow unit on US fans, air handling units, range hoods and duct design tables. m³/h is the unit in European and most international ventilation standards and equipment data. Both are volumetric, so converting is a single multiplication. It does not correct for air density: a rating at standard conditions converts to m³/h at the same conditions.
CFM to m³/h Formula
m³/h = CFM × 1.69901
One cubic foot per minute equals 1.69901 cubic metres per hour. Going the other way, one cubic metre per hour equals 0.588579 CFM.
Worked Example
Converting 1000 CFM:
1000 × 1.69901 = 1699.01 m³/h
CFM to m³/h Conversion Table
| CFM | m³/h |
|---|---|
| 1 CFM | 1.69901 m³/h |
| 10 CFM | 16.9901 m³/h |
| 50 CFM | 84.9504 m³/h |
| 100 CFM | 169.901 m³/h |
| 250 CFM | 424.752 m³/h |
| 500 CFM | 849.504 m³/h |
| 1000 CFM | 1699.01 m³/h |
| 2000 CFM | 3398.02 m³/h |
| 5000 CFM | 8495.04 m³/h |
Going the other way? Use the m³/h to CFM converter. For any other unit pair, the full flow rate converter handles every supported unit.
FAQ
Common questions about converting cubic feet per minute to cubic metres per hour.
Frequently Asked Questions
How do I convert CFM to m³/h?
Multiply the CFM value by 1.69901. For example, 1000 CFM x 1.69901 = 1699.01 m³/h. The factor is 0.0283168 m³ per cubic foot times 60 minutes per hour.
How many m³/h is 1 CFM?
One cubic foot per minute is 1.69901 cubic metres per hour, or 0.471947 litres per second.
What is 400 CFM in m³/h?
400 CFM is 679.6 m³/h. 400 CFM per ton of cooling is a common HVAC rule of thumb, which works out to about 680 m³/h per 3.5 kW of cooling.
How do I convert CFM to L/s?
Multiply by 0.471947. 1,000 CFM is 471.9 L/s. L/s is the airflow unit in UK, Australian and many ISO ventilation standards; m³/h is more common in continental Europe.
Is SCFM the same as CFM?
No. CFM is the actual volume of air moved at operating conditions; SCFM is that volume corrected to standard temperature and pressure. The 1.69901 factor applies to either, but only convert like for like: SCFM to standard m³/h, ACFM to actual m³/h.
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