We use estimates of ages and abundances made for a set of eclipsing binaries (Kovaleva, 2001, Cat. <J/AZh/78/1104), to re-calculate observational values of radii, effective temperatures and luminosities of these stars for solar abundance ZAMS. Geneva group evolutionary grids of models were used for this recalculation. We also present empirical and semi-empirical (for ZAMS evolutionary stage and solar metallicity) relations between mass and luminosity, temperature and radius.