Kinetic viscosity of a given liquid is the ratio of

Kinematic viscosity (often referred to as kinetic viscosity in some contexts) is defined as the ratio of a fluid's dynamic viscosity (or coefficient of viscosity) to its density [t2][t6]. While dynamic viscosity measures a fluid's resistance to flow under an applied external force, kinematic viscosity measures this resistance under the influence of gravity [t5][t9]. Mathematically, it is expressed as ν = η / ρ, where η is the dynamic viscosity and ρ is the density [t6][t7]. This relationship allows for the conversion between the two types of viscosity if the fluid's density is known [t3]. In the International System of Units (SI), dynamic viscosity is measured in pascal-seconds (Pa·s), whereas kinematic viscosity is measured in square meters per second (m²/s) [t4][t7]. Common non-SI units include centipoise for dynamic viscosity and centistokes for kinematic viscosity [t3][t5].

Sources

1. [1] https://www.sciencedirect.com/topics/physics-and-astronomy/kinematic-viscosity