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.

Nomenclature & Symbols for Engineering, Mathematics, and Scienceor 

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Archimedes Number
Arrhenius Number
Atomic Number
Atwood Number
Biot Number
Bodenstein Number
Bond Number
Capillary Number
Cauchy Number
Cavitation Number
Darcy-Weisbach Equation
Dean Number
Drag Coefficient
Eckert Number
Elasticity Number
Ericksen Number
Euler Number
Fourier Number
Froude Number
Galileo Number
Graetz Number
Grashof Number
Hagen Number
Hydraulic Gradient
Kinetic Friction Coefficient