The interpolation calculator provided below is used to determine:
- 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 Viscosity Index (VI) by the formulas specified in ASTM D2270 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100°C 1`) or in ISO 2909 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100°C 1`) or in ГОСТ 25371-2018 (`Нефтепродукты. Расчёт индекса вязкости по кинематической вязкости`)
Any mineral oil is supplied with the specification of kinematic viscosity values at two different temperatures, usually at 40°C and at 100°C (or at 100°F and at 210°F). These data is enough to determine kinematic viscosity at any other values of temperature and as well Viscosity Index.
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.
The calculator below is for informative purposes only. The use of any of the calculators’ results is at the user’s sole risk.
How to use calculator
Just put your values (either imperial or metrical) in the appropriate fields below and press ENTER. All other values will be re-calculated automatically. The graphic curve will be updated as well.
|Select hydraulic oil:|
|Kinematic viscosity at Temperature #1||cSt||SUS|
|Kinematic viscosity at Temperature #2||cSt||SUS|
|Temperature to calculate||°C||°F|
|Kinematic viscosity at calc. temperature||cSt||SUS|
by ISO 2909:2002 Procedures A and B
by ASTM D2270-04 Procedures A and B
by ГОСТ 25371-2018 Методы А и Б
If you find some mismatch or an error or just have any questions please do not hesitate to leave your comments below.