If you have the viscosity in centiPoise, divide the centiPoise value by the oil's viscosity to get centiStokes. This calculator uses centiStokes (cSt), which are equivalent to mm^2/s. Higher quality oils tend to have higher viscosity indices, and while there are ranges in every category, a synthetic oil will tend to have a much higher viscosity index than its conventional counterpart. If you know the viscosity of your oil at 40✬ and 100✬ (100✯ and 212✯) you can easily calculate its Viscosity Index. This tiny calculator tool makes it easy to carry out viscosity indexmixing oil or KV-T calculations for petroleum fluids, such as lubricants, fuels.

Oil needs to flow when cold, but not get too thin and runny when it's warm. That is, oil with a high VI will retain their viscosity over a wider temperature range and work as designed in both hot and cold environments.Ī higher VI is important when your machine will experience a big change in operating temperatures. 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. The higher the viscosity index, the lower the change in viscosity. Viscosity is a measure of the resistance of a fluid to being deformed by either shear stress or extensional stress. The degree to which the viscosity decreases determines the Viscosity Index (VI). You can use these calculators in a variety of ways.

The viscosity of an oil decreases as temperature increases. An Internet search on viscosity index calculator will direct you to several Web pages. Viscosity Index and what you need to know In this calculator, you will learn what the absolute viscosity of water is (commonly known as its dynamic viscosity) and how to convert it to kinematic.

Viscosity index calculator