Helmholtz coils are used to establish a uniform magnetic field with the known value necessary for different applications from the technical field, such as: the calibrating of the magnetic field sensor, electromagnetic immunity (EMI) testing research regarding the magnetic field effects against human body. Generally the practical realization of the Helmholtz coils is based on the classic study of the magnetic field, namely the magnetic field computation only on the coils axis. In this paper are shown on the basis of the magnetic field analytical computation in any point of the space (3D), that there are other domains in which the magnetic field is uniform.

Keywords: Uniform magnetic field, Helmholtz coils.