For user reference, 1 mm 2/s = 10 -6m 2/s = 1 cSt.ġ.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. No other units of measurement are included in this standard.ġ.4.1 The values stated in SI units are to be regarded as the standard. ![]() The determination of the kinematic viscosity of a petroleum product shall be carried out in accordance with Test Methods D445, D7042, IP 71, or ISO 3104.ġ.3.1 If Viscosity Index calculated for a given sample using kinematic viscosity measurements from different test methods are in disagreement, the values calculated from Test Method measurements shall be accepted.ġ.4 The values stated in SI units are to be regarded as standard. See Test Method D341, Annex A1.ġ.3 The kinematic viscosity values are determined with reference to a value of 1.0034 mm 2/s at 20.00 ☌ for distilled water. Such viscosity index data may be considered as suitable for information only and not for specification purposes. Equations are provided for calculating viscosity index for petroleum products having kinematic viscosities above 70 mm 2/s at 100 ☌.ġ.2.1 In cases where kinematic viscosity data are not available at temperatures of 40 and 100 ☌, an estimate may be made of the viscosity index by calculating the kinematic viscosity at temperatures of 40 and 100 ☌ from data obtained at other temperatures. Table 1 given in this practice applies to petroleum products with kinematic viscosities between 2 and 70 mm 2/s at 100 ☌. Note 1-The results obtained from the calculation of VI from kinematic viscosities determined at 40 and 100 ☌ are virtually the same as those obtained from the former VI system using kinematic viscosities determined at 37.78 and 98.89 ☌.ġ.2 This practice does not apply to petroleum products with kinematic viscosities less than 2.0 mm 2/s at 100 ☌. The graphic curve will be updated as well.1.1 This practice covers the procedures for calculating the viscosity index of petroleum products, such as lubricating oils, and related materials from their kinematic viscosities at 40 and 100 ☌. All other values will be re-calculated automatically. 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. ![]() 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:
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