Convert Cubic Centimeters per Second to CFM

Formula

CFM = cm³/s × 0.002118880003289

or CFM = cm³/s ÷ 471.9474432

Derivation from SI units:

• 1 cm³/s = 10⁻⁶ m³ ÷ 1 s
• 1 CFM = (0.3048 m)³ ÷ 60 s = 4.719474432 × 10⁻⁴ m³/s
• 1 cm³/s = 0.000001 m³/s ÷ 0.0004719474432 m³/s per CFM = 0.002118880003289 CFM

Both units are defined exactly, so the factor is exact. Cubic Centimeter per Second definition: cubic centimeter per second; Cubic Foot per Minute definition: cubic foot per minute.

Worked examples

1. A reading of 2 cm³/s converts to 0.004237760007 CFM.
   2 cm³/s × 0.002118880003 = 0.004237760007 CFM
2. A value of 50 cm³/s is 0.1059440002 CFM.
   50 cm³/s × 0.002118880003 = 0.1059440002 CFM

Where it's used

Cubic Centimeters per Second are used for air permeability testers that report flow before dividing by area, while cubic feet per minute appear in US HVAC airflow (about 400 CFM per ton of cooling). Both measure volumetric flow rate (volume per unit time), so the conversion is a fixed factor.

Cubic Centimeter per Second 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 2 with SI prefix centi.
• 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.