Dimensionless Numbers

These numbers have a quantity of one and can not be measured on a scale of physical units.  It is a pure number, thus always having a dimension of 1. The number does not change even if the number system you are working in does.  Dimensionless numbers are used in engineering, mathematics, physics and economics.

For formula info see Nomenclature & Symbols for Engineering, Mathematics, and Scienceor

Display #
Lewis Number
Lift Coefficient
Mach Number
Nusselt Number
Ohnesorge Number
Peclet Number
Pipeline Parameter
Power Number
Pressure Coefficient
Pressure Gradient
Rayleigh Number
Relative Density
Relative Roughness
Reynolds Number
Schmidt Number
Sherwood Number
Specific Gravity
Stanton Number
Static Friction Coefficient
Strouhal Number
Ursell Number
Weber Number