Cubic Foot per Minute (CFM)
The cubic foot per minute (CFM, ft³/min) is a flow of one cubic foot each minute, exactly 4.719474432 × 10⁻⁴ m³/s (about 1.699 m³/h).
Symbol: CFM
Quantity: volumetric flow rate (volume per unit time)
SI relation: 1 CFM = 0.0004719474432 m³/s (exact)
Derivation: 1 CFM = (0.3048 m)³ ÷ 60 s = 4.719474432 × 10⁻⁴ m³/s
Exact: yes, by definition
Typical uses
- US HVAC airflow (about 400 CFM per ton of cooling)
- Fan, blower and dust-collector ratings
- Air compressor capacity
- Range hoods and bathroom exhaust fans
Convert cubic feet per minute to other units
Open the Flow Rate Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "cubic foot per minute (ft³/min)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Cubic Foot per Minute (CFM). Retrieved October 17, 2026, from https://scientificconverters.com/units/cubic-foot-per-minute/
IEEE
Scientific Converters, "Cubic Foot per Minute (CFM)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/cubic-foot-per-minute/