A Set of Calculation Tools Based on Standard ASTM Methods
Calculate Viscosity at Any Temperature (ASTM D341)
Given the viscosity at two known temperatures, the viscosity at any desired third temperature is calculated.
Calculate the Blend Ratio of Two Oils to Reach a Target Viscosity
Given the viscosity of two base oils and a target viscosity, the weight/volume percentage of each oil in the blend is calculated.
Calculate the Blend Viscosity of Two Known Oils
Given the viscosity of two oils and the percentage of each in the blend, the final blend viscosity is calculated.
Calculate Viscosity Index (VI)
Given the viscosity at 40°C (U) and the viscosity at 100°C (Y), the viscosity index is calculated according to ASTM D2270 (quadratic equation method).
Calculate Viscosity at 40°C from VI
Given the viscosity index (VI) and the viscosity at 100°C (Y), the viscosity at 40°C (U) is calculated according to ASTM D2270.
Calculate Viscosity at 100°C from VI
Given the viscosity index (VI) and the viscosity at 40°C (U), the viscosity at 100°C (Y) is calculated according to ASTM D2270.