A fluid viscosity can be described by its Dynamic viscosity (sometimes called Absolute viscosity), or it’s Kinematic viscosity.  These two expressions of viscosity are not the same, but are linked via the fluid density.


Kinematic viscosity = Dynamic viscosity / fluid density


Dynamic Viscosity

Water @ 20°C has a viscosity of 1.00 x 10 -3 Pa • s or 1.00 Centipoise

Water @ 70°F has a viscosity of 2.04 x 10 -5 lbf •s/ft²


Kinematic Viscosity

Water @ 20°C has a viscosity of 1.004 x 10 -6 m² /s or 1.004000 Centistokes

Water @ 70°F has a viscosity of 10.5900 x 10 -6 ft² /s



Pipe Flow Wizard has a database of viscosities and densities for common fluids.