July 16, 2019

Calculation Tools

Hertzian Contact Pressure

Calculate the Hertzian Contact Pressure between two ellipsoids.

Body 1

Body 2


Mean pressure: - MPa
Max. pressure: - MPa
Normal force: - N
Contact area: - mm2
Semi-axis a: - mm
Semi-axis b: - mm

Viscosity Index

Calculate the Viscosity Index (VI) of an oil according to ASTM D2270-10 (2016).

Kinematic Viscosity at 40 °C [cSt]:

Kinematic Viscosity at 100 °C [cSt]:

Viscosity Index: