Electric constant is equal to 8.85418782 × 10^{-12} m^{-3} kg^{-1} s^{4} A^{2}. It is a physical constant with the value of the absolute dielectric permittivity of classical vacuum. It is the measurement of capability of vacuum in permitting the electric field lines. Its also called as vacuum permittivity or permittivity of free space.

Electric constant is equal to 8.85418782 × 10^{-12} m^{-3} kg^{-1} s^{4} A^{2}. It is a physical constant with the value of the absolute dielectric permittivity of classical vacuum. It is the measurement of capability of vacuum in permitting the electric field lines. Its also called as vacuum permittivity or permittivity of free space.

The value of electric constant ε_{0} is given as 1 / (μ_{0}c_{2}), where c is the speed of light in classical vacuum,μ_{0} is the magnetic constant.

The value of electric constant ε_{0} is given as 1 / (μ_{0}c_{2}), where c is the speed of light in classical vacuum,μ_{0} is the magnetic constant.