Hα-derived SFRs using Eq. (3) vs. SFR_10 Myr for NEWCLUSTER (black squares) and NEWHORIZON (red circles) simulated galaxies in a face-on configuration. The identity line is shown in black, and the dotted purple and orange lines show the best-fit of the Hα-derived SFRs using the conversion of Reddy et al. (2022) and Murphy et al. (2011), respectively (see Sect. 4.1 for details). In the top left corner, the slopes and offsets are shown with the same color code as the lines, and the scatter σ of the inferred SFRs.