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The current version of the viscosity calculator is unstable and incomplete. For demonstration purposes only.

The application allows to solve the following tasks:

  • Viscosity-temperature extrapolation for liquids and gases
  • Plotting viscosity-temperature charts
  • Viscosity calculation for blend of liquid petroleum products
  • Conversion between dynamic and kinematic viscosity

Methods used, for example

  • ASTM D341 - 17 Standard Practice for Viscosity-Temperature Charts for Liquid Petroleum Products

This test method details the standard procedure for plotting viscosity-temperature charts that ascertain the kinematic viscosity of a petroleum oil or liquid hydrocarbon at any temperature within a limited range, provided that the kinematic viscosities at two temperatures are known.

  • Walter's equation for blend of liquid petroleum products
  • Vogel-Fulcher-Tammann's equation for liquids
  • Sutherland model for gases