![]() ![]() The use of any of the calculators' results is at the user's sole risk. The calculator on this site is for informative purposes only and we make no claims as to the accuracy, completeness or fitness for any particular purpose of the results produced by our calculators. The calculator can be a useful tool for predicting viscosity at a target temperature, but keep in mind that in real world applications a theoretical viscosity value should always be verified with a viscosimeter. The viscosity at the target temperature is calculated when you click the 'calculate' button. This page allows the user to enter two temperature-viscosity points, and a target temperature. Lubricating oil producers normally publish the viscosity of their products at two different temperatures. Given two known temperature-viscosity points, the viscosity of a liquid can be calculated for a target temperature. The viscosity of a liquid as a function of temperature can be approximated with the Andrade correlation. The temperature must be defined to interpret the viscosity reading.Calculate the viscosity at a given temperature, when the viscosity is known at two temperatures. Likewise, reporting viscosity for trending purposes without a reference to temperature is nonsensical. Viscosity is not a dimensional measurement, so calling highly viscous oil thick and less viscous oil thin is misleading. Sometimes, viscosity is erroneously referred to as thickness (or weight). Generally speaking, viscosity is a fluid’s resistance to flow (shear stress) at a given temperature. You need the value for density, as well as a. Viscosity describes a fluid’s internal resistance to flow and may be thought of as a measure of fluid friction. It is commonly perceived as thickness, or resistance to flow. Given the importance of viscosity analysis coupled with the increasing popularity of onsite oil analysis instruments used to screen and supplement offsite laboratory oil analysis, it is essential that oil analysts understand the difference between dynamic and kinematic viscosity measurements. Calculate with this converting program the units to US/UK units or SI units. Viscosity is a measure of the resistance of a fluid to being deformed by either shear stress or extensional stress. ![]() By contrast, most onsite viscometers measure dynamic viscosity, but are programmed to estimate and report kinematic viscosity, so that the viscosity measurements reported reflect kinematic numbers reported by most labs and lube oil suppliers. Most used oil analysis laboratories measure and report kinematic viscosity. The two are easily confused, but are significantly different. Viscosity can be measured and reported as dynamic (absolute) viscosity or as kinematic viscosity. However, there is more to viscosity than meets the eye. Likewise, there is no property more critical to effective component lubrication than base oil viscosity. Of all the tests employed for used oil analysis, none provides better test repeatability or consistency than viscosity. Viscosity reporting is only valid when the temperature at which the test was conducted also is reported - for example 23 cSt at 40 degrees C. Viscosity is a measure of the resistance of a fluid to being deformed by either shear stress or extensional stress. This value is converted to standard units such as centistokes (cSt) or square millimeters per second. Viscosity calculator Exactly on the milliliter. It is determined by measuring the time in seconds, required for a fixed volume of fluid to flow a known distance by gravity through a capillary within a calibrated viscometer at a closely controlled temperature. Kinematic viscosity is a measure of a fluid's internal resistance to flow under gravitational forces.
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