Pascal Seconds to Poise Converter
Common Conversions
| Pa·s | P |
|---|---|
| 0.001 | 0.01 |
| 0.005 | 0.05 |
| 0.01 | 0.1 |
| 0.05 | 0.5 |
| 0.1 | 1 |
| 0.2 | 2 |
| 0.5 | 5 |
| 1 | 10 |
| 5 | 50 |
| 10 | 100 |
Why this conversion matters in chemistry
Take cross-era polymer-melt math. A 0.5 Pa·s polymer-melt viscosity is 5 P — the form classical capillary-flow analysis in classical transport-phenomena texts reports the same quantity in. The 10 P per Pa·s is the gram-centimeter (CGS) versus kilogram-meter (SI) basis difference reduced to a single multiplier. Water at 20 °C provides the canonical anchor: 1.002 cP, equivalently 0.01002 P or about 1 mPa·s. In practice it's a unit handoff between legacy fluid-dynamics literature and modern SI rheology data.
Formula
P = Pa·s × 10
Worked Examples
0.001 Pa·s = 0.01 P
Water at 20 °C — equivalently 1 cP, the canonical anchor.
0.1 Pa·s = 1 P
About a moderately viscous liquid — the conversion anchor.
1.49 Pa·s = 14.9 P
Glycerol at 25 °C — useful as a high-viscosity reference.
Frequently Asked Questions
How do I convert Pa·s to poise?
Multiply by 10. So water at 20 °C (0.001 Pa·s) becomes 0.01 P = 1 cP. The factor comes from CGS (g·cm⁻¹·s⁻¹) versus SI (kg·m⁻¹·s⁻¹) base-unit differences.
Why does chemistry literature still use centipoise?
Centipoise stuck around because water at room temperature is essentially 1 cP — a memorable anchor that makes other liquids easy to compare (ethanol ~1.2 cP, glycerol ~1410 cP at 20 °C). Many handbook tables, polymer rheology references, and chromatography guides still report in cP.
How do poise and centipoise relate?
1 poise = 100 centipoise. Most chemistry references prefer centipoise because the values come out convenient: water at 20 °C is about 1 cP = 0.01 P, anchoring the readability of the scale.