\journalname
Astronomy&AstrophysicsReview

Calibration of single-star properties

\label{singlestars}
With our new sample of nearly 200 accurate masses and radii, the question arises if a calibration can be devised to estimate precise values of \(M\) and \(R\) for single stars from observable indicators of the basic parameters mass, composition, and age. A91 speculated about the way such a calibration could be devised, but did not proceed to action on the basis of the data available then. Our new, larger sample of binary parameters -- including [Fe/H] for many systems -- allowed us to make a new attempt, described in the following.