What is the SI Unit of Magnetic Field?

SI Unit of a Magnetic Field is Tesla (T)

Tesla (symbol: T) is the SI unit for magnetic flux density, also referred to as magnetic B-field strength.

The magnetic field measures the strength and direction of a magnetic field at a specific point in space. One tesla is equivalent to one Weber per square meter (Wb/m²).

1 T = 1 Wb/m²

The unit ‘Tesla‘ is named after the Serbian-American inventor and electrical engineer Nikola Tesla. One tesla is defined as the magnetic field strength that exerts a force of one Newton on a charge of one coulomb moving perpendicular to the field at a speed of one meter per second.

In addition to the tesla, the gauss (G) is another unit commonly used to measure the magnetic field, especially in older literature or in certain specialized fields. One tesla is equal to 10⁴ gauss.

1 T = 10⁴ G