Viscosity Units Converter







kilogram/metre second

kg m-1 s-1

pascal second (newton second/square metre)

Pa s (N s m-2)

kilogram-force second/square metre

kgf s m-2

pound-force second/square foot

lbf s ft-2

pound-force hour/square foot

lbf h ft-2

pound/foot second

lb ft-1 s-1

pound/foot hour

lb ft-1 h-1

The viscosity

The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water .
Viscosity can be conceptualized as quantifying the internal frictional force that arises between adjacent layers of fluid that are in relative motion. For instance, when a fluid is forced through a tube, it flows more quickly near the tube's axis than near its walls. In such a case, experiments show that some stress (such as a pressure difference between the two ends of the tube) is needed to sustain the flow through the tube. This is because a force is required to overcome the friction between the layers of the fluid which are in relative motion: the strength of this force is proportional to the viscosity.