Convert Millimeters per Second to CFM per Square Foot
1 millimeter per second (mm/s) equals 0.1968503937 cubic feet per square foot per minute (ft³/(ft²·min)).
1 mm/s = 0.1968503937 ft³/(ft²·min)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk millimeter per second to cubic foot per square foot per minute converter to paste a column from Excel.
How to Convert Millimeter per Second to CFM per Square Foot
- 1 mm/s = 0.1968503937 ft³/(ft²·min)
- 1 ft³/(ft²·min) = 5.08 mm/s
- Example: convert 15 mm/s to ft³/(ft²·min): 15 mm/s = 15 × 0.1968503937 ft³/(ft²·min) = 2.952755906 ft³/(ft²·min)
Formula
ft³/(ft²·min) = mm/s × 0.1968503937008
or ft³/(ft²·min) = mm/s ÷ 5.08
Derivation from SI units:
- 1 mm/s = 0.001 m ÷ 1 s = 1 L/(m²·s)
- 1 ft³/(ft²·min) = 0.3048³ m³ ÷ (0.3048² m² × 60 s) = 0.00508 m/s = 1 ft/min
- 1 mm/s = 0.001 m/s ÷ 0.00508 m/s per ft³/(ft²·min) = 0.1968503937008 ft³/(ft²·min)
Both units are defined exactly, so the factor is exact. Millimeter per Second definition: millimeter per second; CFM per Square Foot definition: cubic foot per square foot per minute.
Worked examples
- A fabric at 100 mm/s (ISO 9237) is 19.68503937 ft³/(ft²·min).
100 mm/s × 0.1968503937 = 19.68503937 ft³/(ft²·min) - 5.08 mm/s is exactly 1 ft³/(ft²·min).
5.08 mm/s × 0.1968503937 = 1 ft³/(ft²·min)
Millimeter per Second to CFM per Square Foot conversion table
| Millimeters per Second (mm/s) | CFM per Square Foot (ft³/(ft²·min)) |
|---|---|
| 1 mm/s | 0.1968503937 ft³/(ft²·min) |
| 5 mm/s | 0.9842519685 ft³/(ft²·min) |
| 10 mm/s | 1.968503937 ft³/(ft²·min) |
| 20 mm/s | 3.937007874 ft³/(ft²·min) |
| 50 mm/s | 9.842519685 ft³/(ft²·min) |
| 100 mm/s | 19.68503937 ft³/(ft²·min) |
| 150 mm/s | 29.52755906 ft³/(ft²·min) |
| 200 mm/s | 39.37007874 ft³/(ft²·min) |
| 250 mm/s | 49.21259843 ft³/(ft²·min) |
| 300 mm/s | 59.05511811 ft³/(ft²·min) |
| 500 mm/s | 98.42519685 ft³/(ft²·min) |
| 750 mm/s | 147.6377953 ft³/(ft²·min) |
| 1000 mm/s | 196.8503937 ft³/(ft²·min) |
| 1500 mm/s | 295.2755906 ft³/(ft²·min) |
| 2000 mm/s | 393.7007874 ft³/(ft²·min) |
| 3000 mm/s | 590.5511811 ft³/(ft²·min) |
Where it's used
European mm/s permeability results are converted to the US CFM/ft² scale. 1 CFM/ft² = 5.08 mm/s exactly.
Millimeter per Second to other face velocity & air permeability units
| Conversion | 1 mm/s equals |
|---|---|
| millimeter per second to meter per second | 0.001 m/s |
| millimeter per second to decimeter per second | 0.01 dm/s |
| millimeter per second to centimeter per second | 0.1 cm/s |
| millimeter per second to meter per minute | 0.06 m/min |
| millimeter per second to foot per minute | 0.1968503937 ft/min |
| millimeter per second to liter per square meter per second | 1 L/(m²·s) |
| millimeter per second to milliliter per second per square centimeter | 0.1 mL/(s·cm²) |
| millimeter per second to cubic centimeter per second per square centimeter | 0.1 cm³/(s·cm²) |
| millimeter per second to liter per square decimeter per minute | 0.6 L/(dm²·min) |
| millimeter per second to cubic decimeter per square centimeter per minute | 0.006 dm³/(cm²·min) |
| millimeter per second to cubic foot per square foot per minute | 0.1968503937 ft³/(ft²·min) |
Frequently asked questions
How many CFM/ft² is 100 mm/s?
100 mm/s = 19.68503937 ft³/(ft²·min).
How many cubic feet per square foot per minute are in 1 millimeter per second?
1 mm/s = 0.1968503937 ft³/(ft²·min).
How do I convert millimeters per second to cubic feet per square foot per minute?
Multiply the value in mm/s by 0.1968503937, or divide it by 5.08. For example, 15 mm/s × 0.1968503937 = 2.952755906 ft³/(ft²·min).
Is the mm/s to ft³/(ft²·min) conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 2 with SI prefix milli.
- ISO 9237:1995 Textiles — Determination of the permeability of fabrics to air, International Organization for Standardization , results expressed in mm/s.
- 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: . 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). Convert Millimeters per Second to CFM per Square Foot. Retrieved October 17, 2026, from https://scientificconverters.com/face-velocity/millimeters-per-second-to-cfm-per-square-foot/
IEEE
Scientific Converters, "Convert Millimeters per Second to CFM per Square Foot," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/face-velocity/millimeters-per-second-to-cfm-per-square-foot/