The SI unit of the permittivity of a dielectric is
farad per meter (F/m).
Permittivity, often denoted as
ε, measures how much a material can polarize in response to an electric field, which affects how it stores electrical energy. The higher the permittivity, the more the material can "permit" or allow electric field lines to pass through it.
In terms of base units,
1 F/m = 1 (Coulomb²) / (Newton·meter²).
This unit helps describe how electric fields behave in different materials, such as air, water, or other dielectrics.