The magnetic flux unit is a measure of the strength of a magnetic field. It is commonly expressed in terms of the three most common units: the tesla (T), the gauss (G), and the weber (Wb). The tesla is the SI unit of magnetic flux density, equal to one weber per square meter. The gauss is the cgs unit of magnetic flux density, equal to one maxwell per square centimeter. The weber is the SI unit of magnetic flux, equal to one volt-second.