AJ Designer

Viscosity Converter

result equals value times from-factor divided by to-factor

Viscosity Conversion =

1 Pascal-Second (Pa·s)

Solution in Other Units

UnitValue
Pascal-Second (Pa·s)1
Millipascal-Second (mPa·s)1000
Centipoise (cP)1000
Pound / Foot-Second (lb/ft·s)0.67196898
Slug / Foot-Second (slug/ft·s)0.020885434
Kilogram / Meter-Second (kg/m·s)1
Micropascal-Second (µPa·s)1000000
Newton-Second / Meter² (N·s/m²)1
Poise (P)10
Pound / Foot-Hour (lb/ft·h)2419.0883
Pound-Force-Second / Foot² (lbf·s/ft²)0.020885434
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Viscosity Unit Conversion

This converter transforms a dynamic viscosity value from one unit into all other supported viscosity units. Each unit is defined relative to the Pascal-second (Pa·s) as the base unit.

result = value × (from factor / to factor)

How It Works

This converter transforms a dynamic viscosity value from one unit into all other supported viscosity units. Each unit is defined relative to the Pascal-second (Pa·s) as the base unit, so the converter multiplies by the source factor and divides by the target factor.

Example Problem

Convert 0.89 pascal-seconds (Pa·s) to centipoise (cP).

  1. 1 Pa·s = 1,000 cP.
  2. 0.89 × 1,000 = 890 cP.

Key Concepts

Dynamic viscosity quantifies a fluid's internal resistance to flow. It is defined as the ratio of shear stress to shear rate. The SI unit is the Pascal-second (Pa-s), while the CGS unit Poise (P) and its sub-unit centipoise (cP) remain widely used in industry. Water at 20 degrees C has a viscosity of about 1 cP, making centipoise a convenient reference point.

Applications

  • Petroleum engineering: classifying crude oil grades and predicting pipeline flow behavior
  • Food science: ensuring consistent texture in sauces, beverages, and dairy products
  • Pharmaceutical manufacturing: controlling coating viscosity for tablet and capsule production
  • Lubricant selection: matching oil viscosity grades (SAE, ISO) to operating temperature ranges

Common Mistakes

  • Confusing dynamic and kinematic viscosity — kinematic viscosity is dynamic viscosity divided by density, and the units are different (m²/s vs Pa-s)
  • Ignoring temperature dependence — viscosity can change by an order of magnitude over a 50 degree C range, so always specify the temperature
  • Mixing CGS and SI without converting — 1 Poise = 0.1 Pa-s, not 1 Pa-s

Frequently Asked Questions

What is dynamic viscosity?

Dynamic viscosity measures a fluid’s resistance to flow under an applied force. The SI unit is the Pascal-second (Pa·s), and a common CGS unit is the Poise (P).

How do you convert centipoise to Pascal-seconds?

Divide the centipoise value by 1,000. For example, water at 20°C has a viscosity of about 1 cP = 0.001 Pa·s.

What is the difference between dynamic and kinematic viscosity?

Dynamic viscosity measures resistance to flow, while kinematic viscosity is dynamic viscosity divided by fluid density. This converter handles dynamic viscosity only.

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