  Motivated by the challenges of calculating the dynamical masses of late-type
galaxies (LTGs) and the enormous amount of data from the Sloan Digital Sky
Survey (SDSS), we calculate virial masses of a sample of approximately 126,000
LTGs from the sixteenth data release of the SDSS. The virial mass estimations
were made considering Newtonian mechanics, virial equilibrium and velocity
dispersion from stars and gas. The procedure gave as a result seven mass
estimations for each galaxy. The calculated masses were calibrated using a
sample of spiral galaxies with velocity rotation curves. Considering the
results from the calibration, we find that the correlation between virial and
dynamical (rotation curve) masses is stronger for high inclination values.
Therefore the calibration relies more on the available data for higher
inclination angle galaxies. We also show that if we have a heterogeneous sample
of galaxies one must take into consideration the size and colour of these
galaxies by using the following variables: Sersic index n, concentration index
and colour of the stars. For relatively smaller and bluer LTGs the gas velocity
dispersion provides a more consistent mass calculation, while for LTGs that are
relatively larger and redder the stellar velocity dispersion provides a better
correlated mass calculation.
