The present disclosure relates to a magnetic component, a converter and an inductor. The magnetic component includes a magnetic core (110) including a first winding window (A), a second winding window (B) and a third winding window (C); and a winding (120) including a first winding (121), a second winding (122) and a third winding (123), which are wound in the first winding window, the second winding window and the third winding window, respectively, wherein when an alike current flows through the first winding, the second winding and the third winding, magnetic fluxes (Φ A ,Φ B ) respectively generated in magnetic core units forming the first winding window and the second winding window are superposed on a first common magnetic column (111) therebetween, and magnetic fluxes (Φ B ,Φ C ) respectively generated in magnetic core units forming the second winding window and the third winding window are superposed on a second common magnetic column (112) therebetween.