Parameter ranges where fitting formulae have been calibrated. Top panel: mass ratio and NS tidal deformability ranges on which fitting formulae for BHNS systems by Kawaguchi et al. (2016) (blue) and Foucart et al. (2018) (red) are calibrated, together with the range for BHNS binaries considered in this work (grey), consistent with M_c = 1.44 ± 0.02 M_⊙. Bottom panel: mass ratio and binary tidal deformability ranges on which disc mass fitting formulae for NSNS systems by Radice et al. (2018c) (blue) and the one presented in the appendix (red) are calibrated, together with the range for NSNS binaries considered in this work (grey), consistent with M_c = 1.44 ± 0.02 M_⊙.