Convert CFM per Square Foot to Feet per Minute
1 cubic foot per square foot per minute (ft³/(ft²·min)) equals 1 foot per minute (ft/min).
1 ft³/(ft²·min) = 1 ft/min
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk cubic foot per square foot per minute to foot per minute converter to paste a column from Excel.
How to Convert CFM per Square Foot to Foot per Minute
- 1 ft³/(ft²·min) = 1 ft/min
- 1 ft/min = 1 ft³/(ft²·min)
- Example: convert 15 ft³/(ft²·min) to ft/min: 15 ft³/(ft²·min) = 15 × 1 ft/min = 15 ft/min
Formula
ft/min = ft³/(ft²·min) × 1
Derivation from SI units:
- 1 ft³/(ft²·min) = 0.3048³ m³ ÷ (0.3048² m² × 60 s) = 0.00508 m/s = 1 ft/min
- 1 ft/min = 0.3048 m ÷ 60 s = 0.00508 m/s
- 1 ft³/(ft²·min) = 0.00508 m/s ÷ 0.00508 m/s per ft/min = 1 ft/min
Both units are defined exactly, so the factor is exact. CFM per Square Foot definition: cubic foot per square foot per minute; Foot per Minute definition: foot per minute.
Worked examples
- An air-to-cloth ratio of 4 ft³/(ft²·min) is a face velocity of 4 ft/min.
4 ft³/(ft²·min) × 1 = 4 ft/min - 20 ft³/(ft²·min) is 20 ft/min.
20 ft³/(ft²·min) × 1 = 20 ft/min
CFM per Square Foot to Foot per Minute conversion table
| CFM per Square Foot (ft³/(ft²·min)) | Feet per Minute (ft/min) |
|---|---|
| 1 ft³/(ft²·min) | 1 ft/min |
| 2 ft³/(ft²·min) | 2 ft/min |
| 5 ft³/(ft²·min) | 5 ft/min |
| 10 ft³/(ft²·min) | 10 ft/min |
| 15 ft³/(ft²·min) | 15 ft/min |
| 20 ft³/(ft²·min) | 20 ft/min |
| 25 ft³/(ft²·min) | 25 ft/min |
| 30 ft³/(ft²·min) | 30 ft/min |
| 40 ft³/(ft²·min) | 40 ft/min |
| 50 ft³/(ft²·min) | 50 ft/min |
| 60 ft³/(ft²·min) | 60 ft/min |
| 75 ft³/(ft²·min) | 75 ft/min |
| 100 ft³/(ft²·min) | 100 ft/min |
| 150 ft³/(ft²·min) | 150 ft/min |
| 200 ft³/(ft²·min) | 200 ft/min |
| 300 ft³/(ft²·min) | 300 ft/min |
| 500 ft³/(ft²·min) | 500 ft/min |
| 1000 ft³/(ft²·min) | 1000 ft/min |
Where it's used
Permeability or air-to-cloth values in CFM/ft² can be read directly as face velocity in fpm.
CFM per Square Foot to other face velocity & air permeability units
Frequently asked questions
Why does CFM/ft² equal fpm?
Cubic feet divided by square feet leaves feet, so ft³/(ft²·min) = ft/min exactly.
How many feet per minute are in 1 cubic foot per square foot per minute?
1 ft³/(ft²·min) = 1 ft/min.
How do I convert cubic feet per square foot per minute to feet per minute?
Multiply the value in ft³/(ft²·min) by 1. For example, 15 ft³/(ft²·min) × 1 = 15 ft/min.
Is the ft³/(ft²·min) to ft/min conversion exact?
Yes. Both units are defined exactly, and 1 ft³/(ft²·min) is exactly 1 ft/min.
Sources
- 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".
- 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 (ft/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). Convert CFM per Square Foot to Feet per Minute. Retrieved October 17, 2026, from https://scientificconverters.com/face-velocity/cfm-per-square-foot-to-feet-per-minute/
IEEE
Scientific Converters, "Convert CFM per Square Foot to Feet per Minute," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/face-velocity/cfm-per-square-foot-to-feet-per-minute/