# Formula Energy of the Magnetic Field of a Coil Magnetic energy    Electric current    Inductance

## Magnetic energy

Unit
Magnetic energy stored in the B-field of the coil.

## Electric current

Unit
Electric current flowing through the coil. The larger the current, the more magnetic energy is stored in the B-field.

## Inductance

Unit
Inductance (here self-inductance) is a characteristic quantity of a coil and indicates how good the coil can form a magnetic field when a current flows through it. The larger the inductance of the coil, the larger the stored energy in the magnetic field.