When measuring viscosity for machine lubrication purposes, it is commonly measured for 40° C (104° F) and for 100° C (212° F). When measuring kinematic viscosity, it is important to specify which temperature it was measured for, because it differs with temperature for each substance. It is calculated as absolute viscosity divided by the density. Kinematic viscosity measures this resistance, as relative to the density of the substance. Absolute Viscosity and Kinematic ViscosityĪbsolute viscosity, also known as dynamic viscosity, measures the resistance of a fluid to a force that is acting upon it to make it flow. The latter is more often used in the automotive industry. There are two types of viscosity: absolute viscosity that is used more commonly in medicine, cosmetics, and cooking, and kinematic viscosity. Viscosity is a measure of internal resistance of fluid to the force causing the fluid to flow. s) Centipoise is properly abbreviated cP, but the alternate abbreviations cps and cPs are also commonly seen.This is what happens when a metal ball falls into a cup of non-viscous coffee.
A centipoise is one millipascal-second (mPa The poise is often used with the metric prefix centi.
What is the difference between a poise and A centipoise? Water has a viscosity of 0.0089 poise at 25 ☌, or 1 centipoise at 20 ☌. A centipoise is one millipascal second (mPa A unit of dynamic viscosity in the CGS system of units. Valid units must be of the dynamic viscosity type. What is the value of 1 centipoise in pascal second?ġ pascal second is equal to 1000 centipoise. What is the SI unit of centipoise?Ī centipoise is one millipascal second (mPa Therefore, 1 Newton-second per square meter (N Click on the “convert” button the result will be 1000 centipoise (cP) within no time.
In the third column, “Select to,” select centipoise (cP) as a measuring unit in which you want to convert. 1 pascal second is equal to 1000 mPa-s, or 1000 cps. You can view more details on each measurement unit: mPa-s or cps The SI derived unit for dynamic viscosity is the pascal second. We assume you are converting between millipascal-second and centipoise. Viscosity Conversion Centipoise (cP) = Centistokes (cSt) x S.G. How do you convert viscosity from cP to cSt? How do you calculate centipoise?Ĭentipoise (cP) = Specific Gravity × Centistokes (cSt). cP is the expression for dynamic viscosity, or absolute viscosity of the oil, and is the measure of the fluids resistance to flow. The most common unit in the United States is the Sabolt Universal Seconds (SUS) or Sabolt Seconds Universal (SSU), which is measured with a Saybolt Viscosimeter.Īlthough the two terms are regularly interchanged, which is further complicated due to 1 cP being equal to 1 cSt, they are in fact two slightly different terms. Viscosity-Because an oil’s viscosity changes with temperature, it is always expressed at a reference temperature, usually 100° and 210° F. The formula for the conversion is: Kinematic (cSt) x Density = Dynamic (cP) Dynamic (cP) / Density = Kinematic (cSt) How do you convert dynamic viscosity?ĭensity actually provides a way to convert between a kinematic and a dynamic viscosity measurement. Calculate SSU viscosity t = / = 138.9 seconds.
Example: Converting Centistokes to SSU Viscosity Calculate 4ac = 4 × 0.226 × -195 = -176.28.
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