In situ formation. Fraction of planets with final mass in a certain mass interval. N_total represents the total amount of planets formed, independently of their mass. Planets are separated into five mass bins (M < 1   M_⊕, 1 < M [M_⊕]  < 10, 10 < M [M_⊕]  < 100, 100 < M [M_⊕]  < 1000, M > 1000   M_⊕). Accreted planetesimals have a radius of 100 km (red), 10 km (green), 1 km (blue) and 0.1 km (magenta). Most of the final masses are in the first mass bin. The inset caption represents the magnified histogram for the other mass bins.