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ASTM D2270 / Viscosity index (VI) from free temperatures

Standard practice for calculating viscosity index from kinematic viscosity at specific, free temperatures.

Calculator for viscosity index (VI) according to ASTM D2270 and ISO 2909. If values are used other than 40°C and 100°C, ASTM D341 is applied before calculating the viscosity index.

mm2/s
at
°C
mm2/s
at
°C

(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 use of any of the calculators' results is at the user's sole risk. Our general terms of use apply.)