m³/h to CFM Calculator: Convert Cubic Meters per Hour to Cubic Feet per Minute
Use this tool to convert flow rate from cubic meters per hour (m³/h) to cubic feet per minute (CFM), the standard unit used in air compressors and HVAC systems.
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Understanding m³/h to CFM Conversion
Flow rate conversions are critical in fluid and air system design. In metric-based regions, flow is commonly measured in cubic meters per hour (m³/h), while in imperial systems — particularly in the U.S. — cubic feet per minute (CFM) is the standard. Converting between these ensures accurate specification, equipment compatibility, and compliance with design standards across international teams and suppliers.
Conversion Formula
To convert cubic meters per hour (m³/h) to cubic feet per minute (CFM), use the following formula:
CFM = m³/h × 0.588577
This conversion factor is derived as follows:
- 1 cubic meter = 35.3147 cubic feet
- 1 hour = 60 minutes
- So, CFM = (m³/h × 35.3147) / 60 = m³/h × 0.588577
Sample Conversions
- 100 m³/h = 58.86 CFM
- 500 m³/h = 294.29 CFM
- 1000 m³/h = 588.58 CFM
- 2000 m³/h = 1177.15 CFM
- 5000 m³/h = 2942.88 CFM
Why Convert m³/h to CFM?
- Cross-Regional Equipment Use: Tools, compressors, and ventilation systems from different regions may use different units.
- Project Collaboration: Engineering teams across countries need standardized airflow understanding.
- Proper Sizing: Ensure tools and compressors are correctly matched to avoid inefficiency or failure.
- System Optimization: Adjust flow rates properly to reduce energy use and increase system life.
Applications of This Conversion
- HVAC Design: Global ventilation standards require understanding both m³/h and CFM.
- Industrial Air Supply: Manufacturing equipment rated in m³/h often operates in facilities with CFM-based systems.
- Compressor Sizing: When purchasing compressors internationally, converting to CFM helps in proper sizing.
- Environmental Monitoring: Air flow sensors and ducting designs often cross between these two units.
m³/h vs CFM Comparison
| Attribute | m³/h | CFM |
|---|---|---|
| Measurement System | Metric (SI) | Imperial |
| Volume Basis | Cubic Meters | Cubic Feet |
| Time Basis | Per Hour | Per Minute |
| Usage Regions | Europe, Asia | USA, Canada |
| Conversion Factor | 1 | × 0.588577 |
Best Practices for Conversion
- Label equipment clearly in both units when possible for international applications.
- Use standard conditions (1 atm, 20°C) for consistent results.
- Always specify whether you're using actual flow or standard flow when high accuracy is needed (ACFM vs SCFM).
- Consult manufacturer documentation when uncertain, especially for pressure-corrected specifications.
Frequently Asked Questions
Q: Is this the same as converting m³/min to CFM?
No — m³/min is a higher flow rate than m³/h. To convert m³/min to CFM, multiply by 35.3147 directly. This calculator is for m³ per hour only.
Q: Can I use this for gas flow?
Yes, for volumetric flow. However, for mass flow of gases, temperature and pressure corrections are needed (use SCFM or ACFM instead).
Q: Is this calculator accurate for high-pressure systems?
This calculator assumes standard atmospheric pressure. For high-pressure systems, use pressure-compensated conversions or consult with engineering data sheets.
Q: What tools typically use m³/h?
European compressors, HVAC fans, air filtration units, and flow meters typically report specs in m³/h.
Conclusion
Whether you’re managing an air system, designing HVAC ductwork, or integrating international compressor equipment, knowing how to convert m³/h to CFM is essential. It allows professionals across engineering, facilities, and manufacturing to speak the same language of airflow. Use this calculator for fast, reliable conversion and make informed choices that ensure safe and efficient system performance.