Foot per Minute (ft/min)
The foot per minute (ft/min, fpm) is a velocity of one foot each minute, exactly 0.00508 m/s. One CFM through one square foot gives exactly 1 fpm.
Symbol: ft/min
Quantity: face velocity and air permeability (volumetric flow per unit area)
SI relation: 1 ft/min = 0.00508 m/s (exact)
Derivation: 1 ft/min = 0.3048 m ÷ 60 s = 0.00508 m/s
Exact: yes, by definition
Same quantity as cubic foot per square foot per minute (ft³/(ft²·min)) : the factor between them is exactly 1.
Typical uses
- Fume hood face velocity (commonly 80–120 fpm)
- Filter face velocity (≈ 300–500 fpm for HVAC filters)
- Duct velocity design
- Baghouse air-to-cloth ratio in US units
Convert feet per minute to other units
Open the Face Velocity & Air Permeability Converter to convert any value between all units.
Sources
- 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). Foot per Minute (ft/min). Retrieved October 17, 2026, from https://scientificconverters.com/units/foot-per-minute/
IEEE
Scientific Converters, "Foot per Minute (ft/min)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/foot-per-minute/