Pound per Foot-second (lb/(ft·s))
The pound (mass) per foot-second is a dynamic viscosity unit used with lbm-based US calculations, about 1.488 Pa·s. Water at 68 °F is about 0.000672 lb/(ft·s).
Symbol: lb/(ft·s) (ASCII: lb/ft.s)
Quantity: dynamic (absolute) viscosity
SI relation: 1 lb/(ft·s) = 1.48816394357 Pa·s (exact)
Derivation: 1 lb/(ft·s) = 0.45359237 kg ÷ (0.3048 m × 1 s) = 1.4881639436 Pa·s
Exact: yes, by definition
Typical uses
- Heat-transfer and chemical-engineering correlations in US units
- Older US property tables
Convert pounds per foot-second to other units
| Conversion | 1 lb/(ft·s) equals | Reverse |
|---|---|---|
| pound per foot-second to pascal-second | 1.488163944 Pa·s | pascal-second to pound per foot-second |
| pound per foot-second to centipoise | 1488.163944 cP | centipoise to pound per foot-second |
| pound per foot-second to millipascal-second | 1488.163944 mPa·s | millipascal-second to pound per foot-second |
| pound per foot-second to poise | 14.88163944 P | poise to pound per foot-second |
| pound per foot-second to pound-force second per square foot | 0.03108095017 lbf·s/ft² | pound-force second per square foot to pound per foot-second |
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 per foot second".
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 per Foot-second (lb/(ft·s)). Retrieved October 17, 2026, from https://scientificconverters.com/units/pound-per-foot-second/
IEEE
Scientific Converters, "Pound per Foot-second (lb/(ft·s))," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/pound-per-foot-second/