Pound-force Second per Square Foot (lbf·s/ft²)
The pound-force second per square foot (lbf·s/ft², equal to slug/(ft·s)) is the US engineering unit of dynamic viscosity, about 47.88 Pa·s.
Symbol: lbf·s/ft² (ASCII: lbf.s/ft2)
Quantity: dynamic (absolute) viscosity
SI relation: 1 lbf·s/ft² = 47.88025898034 Pa·s (exact)
Derivation: 1 lbf·s/ft² = 4.4482216152605 N·s ÷ 0.09290304 m² = 47.880258980 Pa·s
Exact: yes, by definition
Typical uses
- US fluid-mechanics textbooks and hydraulics
- Reynolds-number calculations in slug-based units
Convert pound-force seconds per square foot to other units
| Conversion | 1 lbf·s/ft² equals | Reverse |
|---|---|---|
| pound-force second per square foot to pascal-second | 47.88025898 Pa·s | pascal-second to pound-force second per square foot |
| pound-force second per square foot to centipoise | 47880.25898 cP | centipoise to pound-force second per square foot |
| pound-force second per square foot to millipascal-second | 47880.25898 mPa·s | millipascal-second to pound-force second per square foot |
| pound-force second per square foot to poise | 478.8025898 P | poise to pound-force second per square foot |
| pound-force second per square foot to pound per foot-second | 32.17404856 lb/(ft·s) | pound per foot-second to pound-force second per square foot |
Open the Dynamic Viscosity 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, "pound-force second per square foot".
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). Pound-force Second per Square Foot (lbf·s/ft²). Retrieved October 17, 2026, from https://scientificconverters.com/units/pound-force-second-per-square-foot/
IEEE
Scientific Converters, "Pound-force Second per Square Foot (lbf·s/ft²)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/pound-force-second-per-square-foot/