Convert Cubic Meters per Hour to Cubic Feet per Minute

Formula

CFM = m³/h × 0.5885777786915

or CFM = m³/h ÷ 1.69901079552

Derivation from SI units:

• 1 m³/h = 1 m³ ÷ 3600 s
• 1 CFM = (0.3048 m)³ ÷ 60 s = 4.719474432 × 10⁻⁴ m³/s
• 1 m³/h = 0.0002777777777778 m³/s ÷ 0.0004719474432 m³/s per CFM = 0.5885777786915 CFM

Both units are defined exactly, so the factor is exact. Cubic Meter per Hour definition: cubic meter per hour; Cubic Foot per Minute definition: cubic foot per minute.

Worked examples

1. A full-size 592 × 592 mm filter rated at 3400 m³/h handles 2001.164448 CFM.
   3400 m³/h × 0.5885777787 = 2001.164448 CFM
2. A 500 m³/h heat-recovery ventilation unit moves 294.2888893 CFM.
   500 m³/h × 0.5885777787 = 294.2888893 CFM

Where it's used

Metric fan, filter and ventilation ratings in m³/h are converted to CFM for US specifications, test reports and controls.

Cubic Meter per Hour to other flow rate units

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8 (hour) with Table 2 (cubic metre).
• 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: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.