Linear density

Linear density
Common symbols	${\displaystyle \rho _{l}}$
SI unit	kg/m
Dimension	${\displaystyle {\mathsf {L}}^{-1}{\mathsf {M}}}$

Linear mass density or simply linear density is defined in the International System of Quantities (ISQ) as the quotient of mass and length. It is also called titer in textile engineering. The SI unit of linear mass density is the kilogram per meter (kg/m).

Although (linear) density is most often used to mean (linear) mass density, the concept can be generalized for the quotient of any other quantity by length, called lineic quantities in the ISQ. For example, linear charge density or lineic electric charge is the amount of electric charge per unit length.

Linear density most often describes the characteristics of one-dimensional objects, although linear density can also be used to describe the density along one particular spatial dimension of a three-dimensional object.