To convert Oersted to Tesla, the relation 1 A/m = 4π × 10^-3 Oe is used, applicable in both vacuum and matter. For a magnetic field strength of 50 Oersted, it can be converted to A/m using this relation. In vacuum, 1 A/m corresponds to a magnetic flux density of 4π × 10^-7 T. Therefore, the magnetic field strength of 50 Oersted can be calculated and expressed in Tesla. Understanding these conversions is essential for accurate magnetic field measurements.