Kinematic viscosity, commonly measured in centistokes (cSt) or mm²/s, is the ratio of a fluid’s dynamic viscosity (cP) to its specific gravity (SG). It represents the time it takes for a specific volume of fluid to flow through an orifice under gravity at a given temperature.
Since kinematic viscosity changes with temperature, its value is meaningless without specifying the temperature. It is measured using a Capillary Tube Viscometer.