Convert Pounds per inch-second to Centipoises
Convert Pounds per inch-second (lb/(in·s)) to Centipoises (cP) instantly and accurately.
Conversion Formula
cP = lb/(in·s) × 17857.96732
About Pounds per inch-second
The pound per inch-second (lb/(in·s)) equals 0.45359237/0.0254 ≈ 17.858 Pa·s, used in plastics extrusion and rubber compounding industries where inch-based dimensions are combined with mass-based flow analysis. Polymer melt viscosities at processing temperatures are sometimes quoted in lb/(in·s) in older US extrusion equipment manuals. 1 lb/(in·s) ≈ 17.858 Pa·s = 12 lb/(ft·s).
About Centipoises
The centipoise (cP) equals 10⁻³ Pa·s, numerically equal to 1 mPa·s. It remains the most widely used practical unit in industry because water at 20 °C has a viscosity of almost exactly 1 cP. Process engineers, petroleum analysts, and food technologists all specify viscosity in cP. Motor oil SAE 10W has a cold-viscosity limit of ≈3 500 cP at -25 °C. 1 cP = 10⁻³ Pa·s = 10⁻² P.
Quick Reference Table
| Pounds per inch-second (lb/(in·s)) | Centipoises (cP) |
|---|---|
| 1 lb/(in·s) | 17858 cP |
| 2 lb/(in·s) | 35715.9 cP |
| 5 lb/(in·s) | 89289.8 cP |
| 10 lb/(in·s) | 178580 cP |
| 25 lb/(in·s) | 446449 cP |
| 50 lb/(in·s) | 892898 cP |
| 100 lb/(in·s) | 1785800 cP |