The SI derived unit for magnetic field strength is: ampere per meter (A/m)
The old SI derived unit Ampere turn is obsolete and not to be used
The SI derived unit for magnetic flux is: weber (Wb) = 1 volt second
The SI derived unit for magnetic flux density is: tesla (T) = 1 weber per square meter (Wb/m2)
The SI derived unit for magnetomotive force is: ampere turn (At)
The CGS unit is the gilbert (Gb) = 10 / (4π) = 0.795 775 ampere turn