Viscosity
lb/(ft·s)toreyn
Convert pounds per foot-second (lb/(ft·s)) to reynolds (lbf·s/in²) (reyn).
Factor1 lb/(ft·s) = 0.0002158399 reyn
Converter
lb/(ft·s)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
reyn
Rendered to 6 significant figures.
Formula
Formula
reyn = lb/(ft·s) × 0.0002158399
Multiply any value in pounds per foot-second by 0.0002158399 to obtain the value in reynolds (lbf·s/in²).
Worked example
Convert 1 lb/(ft·s) to reyn.
- 01Start with 1 lb/(ft·s).
- 02Multiply by the conversion factor: 1 × 0.0002158399 = 0.00021584 reyn.
Result1 lb/(ft·s) = 0.00021584 reyn
Conversion table
| lb/(ft·s) | reyn |
|---|---|
| 1 | 0.00021584 |
| 2 | 0.00043168 |
| 5 | 0.0010792 |
| 10 | 0.0021584 |
| 20 | 0.0043168 |
| 50 | 0.010792 |
| 100 | 0.021584 |
| 200 | 0.043168 |
| 500 | 0.10792 |
| 1000 | 0.21584 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from lb/(ft·s) to reyn?
1 lb/(ft·s) equals 0.0002158399 reyn. To convert, multiply the value in pounds per foot-second by 0.0002158399.
How do I convert 1 lb/(ft·s) to reyn?
1 lb/(ft·s) = 0.00021584 reyn. For any value, multiply by 0.0002158399.
How do I convert reyn back to lb/(ft·s)?
Divide by the same factor — or equivalently, multiply by 4633.063. So 1 reyn = 4633.06 lb/(ft·s).
When would I need to convert pound per foot-second to reynolds (lbf·s/in²)?
Dynamic viscosity conversions between lb/(ft·s) and reyn are common in fluid characterisation, pump and control valve sizing, pipeline pressure-drop calculations, and lubrication engineering. Centipoise (cP) and mPa·s are the most widely used units in process datasheets; Pa·s is required for most simulation tools.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).