Calibrated mixing-length relationships. Left: calibrated mixing lengths as a function of [Fe/H]. The points in gray are the individual calibrations for RGB stars in APOKASC3. The plotted [Fe/H] values are the Salaris-corrected values. The blue line is the final mixing-length–metallicity relationship used for determining the seismic properties from the model grid. Right: calibrated mixing length as a function of stellar mass in solar masses. The color-coding indicates the Salaris-corrected metallicity for RGB stars in APOKASC3. See Section 4.3.1 for discussion of this figure.