Saturated profiles of the field intensity, current density and charge density at the ground surface and underneath monopolar HVDC transmission lines are calculated by using simple expressions. These expressions give the relation between the saturated values and the length of the field lines emanating from or terminating at the energized conductor. The calculated values are compared with those previously calculated and measured experimentally. Both absolute and normalized saturated corona profiles at the ground surface and underneath HVDC monopolar transmission lines are calculated using simple expressions. Relations between the saturated values at any position on the ground surface and the length of the field line emanating from or terminating at the conductor are given. These relationships are used for both outdoor and indoor models.