Convert mL/(s·cm²) to CFM per Square Foot

Formula

ft³/(ft²·min) = mL/(s·cm²) × 1.968503937008

Derivation from SI units:

• 1 mL/(s·cm²) = 10⁻⁶ m³ ÷ (10⁻⁴ m² × 1 s) = 0.01 m/s = 1 cm/s
• 1 ft³/(ft²·min) = 0.3048³ m³ ÷ (0.3048² m² × 60 s) = 0.00508 m/s = 1 ft/min
• 1 mL/(s·cm²) = 0.01 m/s ÷ 0.00508 m/s per ft³/(ft²·min) = 1.968503937008 ft³/(ft²·min)

Both units are defined exactly, so the factor is exact. Milliliter per Second per Square Centimeter definition: milliliter per second per square centimeter; CFM per Square Foot definition: cubic foot per square foot per minute.

Worked examples

1. A reading of 5 mL/(s·cm²) converts to 9.842519685 ft³/(ft²·min).
   5 mL/(s·cm²) × 1.968503937 = 9.842519685 ft³/(ft²·min)
2. A value of 25 mL/(s·cm²) is 49.21259843 ft³/(ft²·min).
   25 mL/(s·cm²) × 1.968503937 = 49.21259843 ft³/(ft²·min)

Where it's used

Milliliters per Second per Square Centimeter are used for air permeability of papers and membranes, while cubic feet per square foot per minute appear in ASTM D737 fabric air permeability (inch-pound reporting). Both measure face velocity and air permeability (volumetric flow per unit area), so the conversion is a fixed factor.

Milliliter per Second per Square Centimeter to other face velocity & air permeability units

Frequently asked questions

Sources

• ASTM D737 Standard Test Method for Air Permeability of Textile Fabrics, ASTM International , SI results per unit area.
• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8 (litre).
• ASTM D737 Standard Test Method for Air Permeability of Textile Fabrics, ASTM International , inch-pound results in ft³/min/ft².
• 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, "foot per minute".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.