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Poise (P)

Poise (P) - dynamic viscosity of fluids, commonly expressed as cP (centipoise) - Jean Louis Marie Poiseuille in the 1838 - 1846, derived during his studies on blood flow.

The analogous unit in the International System of Units is the pascal second (Pa·s): 1 Pa·s = 1 kg·m-1·s-1 = 10 P

The poise is often used with the metric prefix centi-. A centipoise is one millipascal-second (mPa·s) in SI units (1 cP = 10-2P = 10-3 Pa·s). Centipoise is properly abbreviated cP, but the alternate abbreviations cps and cPs are also commonly seen.
Water has a viscosity of 0.0089 poise at 25°C, or 1 centipoise at 20°C.

Described as a unit of dynamic viscosity, centipoise is the amount of force necessary to move a layer of liquid in relation to another liquid. Centipoise is considered the standard unit of measurement for fluids of all types. It is one hundredth of a poise. The symbol for centipoise is cP or cps, depending on the source.

Centistokes (cSt)

Centistokes (cSt) - A unit of kinematic viscosity, one hundreth of a stokes. Symbol, cSt. In practice, measurements are usually stated in centistokes, not stokes.
The kinematic viscosity of water is about 1.0038 centistokes.
CentiPoises(cp) = CentiStokes (cSt) x SG (Specific Gravity) or, cP divided by density = cSt