ARO SCIENTIFIC TECHNICAL TOOLS
Viscosity Calculators
Free technical calculators for viscosity index, viscosity-temperature relationships and common viscosity conversions used in petroleum, lubricant and laboratory applications.ASTM D341 Viscosity-Temperature
Estimate kinematic viscosity at a selected temperature from two known viscosity-temperature points.
Use calculator → VIASTM D2270 Viscosity Index
Calculate viscosity index from kinematic viscosity measured at 40 °C and 100 °C.
Use calculator → VI T°VI from Selected Temperatures
Estimate 40 °C and 100 °C viscosities from two user-selected temperatures, then determine viscosity index.
Use calculator → SUSSaybolt Universal Viscosity
Convert Saybolt Universal Seconds to an approximate kinematic viscosity value.
Use calculator → SFSSaybolt Furol Viscosity
Convert Saybolt Furol Seconds to an approximate kinematic viscosity value.
Use calculator → cP ↔ cStDynamic ↔ Kinematic Viscosity
Convert between dynamic and kinematic viscosity using fluid density.
Use calculator →Viscosity calculations for petroleum products and lubricants
These calculators provide convenient engineering and laboratory calculations for common viscosity relationships and conversions. They are intended as practical technical tools and should not replace measurement using the applicable test method where a measured result is required.
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Browse ARO Scientific viscosity standards and related laboratory reference materials.
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