The charge density is the measure of electric charge per unit area of a surface, or per unit volume of a body or field.

The charge density describes how much electric charge is accumulated in a particular field. Specifically, it finds the charge density per unit volume, surface area, and length.

The SI unit of Charge density is C.

Charge density formula is given by,

σ** = **q / A

Where,

q = electric charge

A = area

Similarly, the volume charge density is given by,

ρv** = **q / v

Where,

q = electric charge

v = volume in m3

The charge density in terms of electric field is given by,

ρ** = **ϵo /** E**

Where

E = electric field

ϵo = permittivity