The units of linear charge density are coulombs per meter (C/m). Linear charge density is defined as the amount of electric charge per unit length along a conductor, expressed mathematically as λ=dqdl\lambda =\frac{dq}{dl}λ=dldq​, where dqdqdq is the charge and dldldl is the length element. Thus, the SI unit is coulombs per meter (C/m).