m³/s to CFM Calculator: Convert Cubic Meters per Second to Cubic Feet per Minute
Use this free calculator to convert flow rates from cubic meters per second (m³/s) to cubic feet per minute (CFM) — essential for comparing airflow between metric and imperial systems.
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Understanding m³/s to CFM Conversion
Cubic meters per second (m³/s) and cubic feet per minute (CFM) are both standard units of volumetric flow rate. m³/s is a metric SI unit often used in scientific, HVAC, and industrial contexts, while CFM is the dominant imperial unit in the United States and parts of Canada. Accurate conversion between these units ensures proper airflow specification across global projects.
Formula for Conversion
To convert from m³/s to CFM:
CFM = m³/s × 2118.88
This comes from:
- 1 cubic meter = 35.3147 cubic feet
- 1 second = 1/60 minute → multiply by 60
- So, CFM = (m³/s × 35.3147) × 60 = m³/s × 2118.88
Sample Conversions
- 0.01 m³/s = 21.19 CFM
- 0.1 m³/s = 211.89 CFM
- 0.5 m³/s = 1059.44 CFM
- 1.0 m³/s = 2118.88 CFM
Where This Conversion Applies
- Air Compressors: International specifications often list airflow in m³/s, while U.S. equipment uses CFM.
- Ventilation Design: Ducts and air handling units require airflow expressed in consistent units.
- Laboratory Systems: Scientific gas flow and fume hoods are specified in m³/s but need CFM for fan sizing.
- Global Equipment Procurement: Tools and fans sourced internationally must match local airflow ratings.
CFM vs m³/s at a Glance
| Property | m³/s | CFM |
|---|---|---|
| Unit System | Metric (SI) | Imperial |
| Base Unit | Cubic meter per second | Cubic foot per minute |
| Used In | Europe, Asia, global | U.S., Canada |
| Conversion | 1 | × 2118.88 |
Engineering & System Design Implications
- Failing to convert accurately can result in:
- Incorrect compressor sizing
- Overloaded duct systems
- Insufficient ventilation rates
- Always confirm if values refer to:
- Volumetric flow (CFM/m³/s)
- Standardized flow (SCFM/Nm³/s) — which accounts for pressure and temperature
Frequently Asked Questions
Q: Is m³/s to CFM a linear conversion?
Yes. The conversion factor is fixed at standard conditions and doesn’t vary with flow rate.
Q: What if my airflow is listed in SCFM?
SCFM includes pressure/temperature corrections. This calculator assumes raw volumetric values at atmospheric pressure.
Q: Can I convert m³/min to CFM here?
No. This page is for m³/s to CFM. For m³/min, use a different calculator or multiply by 35.3147.
Q: Can I use this calculator for gas flow?
Yes — but only for volumetric flow. For mass flow, additional properties of the gas are needed.
Conclusion
Accurate unit conversion between m³/s and CFM is essential for professionals working in HVAC, process engineering, fluid dynamics, and environmental design. Whether you're sizing air systems or comparing equipment from different regions, this calculator ensures correct conversions and helps bridge the gap between imperial and metric standards. Use this tool to eliminate guesswork and streamline your global design projects.