Abstract The empirical relations between rotation period, chromospheric activity, and age can be used to estimate stellar age. To calibrate these relations, we present a catalog, including the masses and ages of 52,321 FGK dwarfs, 47,489 chromospheric activity index log R HK + , 6077 rotation periods P _rot, and variability amplitudes S _ph, based on data from LAMOST DR7, Kepler, and Gaia Data Release 3. We find a pronounced correlation among P _rot, age, and [Fe/H] throughout the main-sequence phase for F dwarfs. However, the decrease of log R HK + over time is not significant except for those with [Fe/H] < −0.1. For G dwarfs, both P _rot and log R HK + are reliable age probes in the ranges ∼2–11 Gyr and ∼2–13 Gyr, respectively. K dwarfs exhibit a prominent decrease in log R HK + within the age range of ∼3–13 Gyr when the relation of P _rot–τ is invalid. These relations are very important for promptly estimating the age of a vast number of stars, thus serving as a powerful tool in advancing the fields of exoplanet properties, stellar evolution, and Galactic archeology.