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1.2.1 In cases where kinematic viscosity data are not avail-ableattemperaturesof40and100☌,anestimatemaybemade of the viscosity index by calculating the kinematic. All other values will be re-calculated automatically. Equations are provided for calculating viscosity index for petroleum products having kinematic viscosities above 70 mm2/s (cSt) at 100☌.
![viscosity index calculator viscosity index calculator](https://www.researchgate.net/profile/Ioana-Stanciu-3/publication/338791959/figure/tbl1/AS:850785265008641@1579854422299/Values-of-kinematic-viscosities-at-40-and-100-C-viscosity-index-and-viscosity_Q320.jpg)
Just put your values (either imperial or metrical) in the appropriate fields below and press ENTER. The use of any of the calculators’ results is at the user’s sole risk. The calculator below is for informative purposes only.
#Viscosity index calculator iso
You can calculate pre-filled values of oil classified by ISO 3448 with grades VG22, VG32, VG46 or VG68 (at viscosity Index = 100) or enter specific values for any other oils. These data is enough to determine kinematic viscosity at any other values of temperature and as well Viscosity Index. the Viscosity Index (VI) by the formulas specified in ASTM D2270 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100☌ 1`) or in ISO 2909 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100☌ 1`) or in ГОСТ 25371-2018 (`Нефтепродукты.the kinematic viscosity values, depends from temperature, calculated by the formulas specified in ASTM D341 – (‘Standard Practice for Viscosity-Temperature Charts for Liquid Petroleum Products’).The interpolation calculator provided below is used to determine: