Convert Pound-force Seconds per Square Foot to Poise
1 pound-force second per square foot (lbf·s/ft²) equals 478.8025898 poise (P).
1 lbf·s/ft² = 478.8025898 P
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound-force second per square foot to poise converter to paste a column from Excel.
How to Convert Pound-force Second per Square Foot to Poise
- 1 lbf·s/ft² = 478.8025898 P
- 1 P = 0.002088543423 lbf·s/ft²
- Example: convert 15 lbf·s/ft² to P: 15 lbf·s/ft² = 15 × 478.8025898 P = 7182.038847 P
Formula
P = lbf·s/ft² × 478.8025898034
Derivation from SI units:
- 1 lbf·s/ft² = 4.4482216152605 N·s ÷ 0.09290304 m² = 47.880258980 Pa·s
- 1 P = 1 dyn·s/cm² = 0.1 Pa·s
- 1 lbf·s/ft² = 47.88025898034 Pa·s ÷ 0.1 Pa·s per P = 478.8025898034 P
Both units are defined exactly, so the factor is exact. Pound-force Second per Square Foot definition: pound-force second per square foot; Poise definition: poise.
Worked examples
- A reading of 0.0000209 lbf·s/ft² converts to 0.01000697413 P.
0.0000209 lbf·s/ft² × 478.8025898 = 0.01000697413 P - A value of 0.01 lbf·s/ft² is 4.788025898 P.
0.01 lbf·s/ft² × 478.8025898 = 4.788025898 P
Pound-force Second per Square Foot to Poise conversion table
| Pound-force Seconds per Square Foot (lbf·s/ft²) | Poise (P) |
|---|---|
| 0.0000001 lbf·s/ft² | 0.00004788025898 P |
| 0.00001 lbf·s/ft² | 0.004788025898 P |
| 0.0000209 lbf·s/ft² | 0.01000697413 P |
| 0.0001 lbf·s/ft² | 0.04788025898 P |
| 0.001 lbf·s/ft² | 0.4788025898 P |
| 0.01 lbf·s/ft² | 4.788025898 P |
| 0.1 lbf·s/ft² | 47.88025898 P |
| 1 lbf·s/ft² | 478.8025898 P |
Where it's used
Pound-force Seconds per Square Foot are used for US fluid-mechanics textbooks and hydraulics, while poise appear in older physics and rheology literature. Both measure dynamic (absolute) viscosity, so the conversion is a fixed factor.
Pound-force Second per Square Foot to other dynamic viscosity units
| Conversion | 1 lbf·s/ft² equals |
|---|---|
| pound-force second per square foot to pascal-second | 47.88025898 Pa·s |
| pound-force second per square foot to millipascal-second | 47880.25898 mPa·s |
| pound-force second per square foot to centipoise | 47880.25898 cP |
| pound-force second per square foot to poise | 478.8025898 P |
| pound-force second per square foot to pound per foot-second | 32.17404856 lb/(ft·s) |
Frequently asked questions
How many poise are in 1 pound-force second per square foot?
1 lbf·s/ft² = 478.8025898 P.
How do I convert pound-force seconds per square foot to poise?
Multiply the value in lbf·s/ft² by 478.8025898. For example, 15 lbf·s/ft² × 478.8025898 = 7182.038847 P.
Is the lbf·s/ft² to P 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
- 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".
- 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, "poise (P)".
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 Pound-force Seconds per Square Foot to Poise. Retrieved October 17, 2026, from https://scientificconverters.com/dynamic-viscosity/pound-force-seconds-per-square-foot-to-poise/
IEEE
Scientific Converters, "Convert Pound-force Seconds per Square Foot to Poise," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/dynamic-viscosity/pound-force-seconds-per-square-foot-to-poise/