  We calibrate reverberation-based black hole masses in active galactic nuclei
(AGNs) by using the correlation between black hole mass, M, and bulge/spheroid
stellar velocity dispersion, sigma. We use new measurements of sigma for 6 AGNs
and published velocity dispersions for 10 others, in conjunction with improved
reverberation mapping results, to determine the scaling factor required to
bring reverberation-based black hole masses into agreement with the quiescent
galaxy M-sigma relationship. The scatter in the AGN black hole masses is found
to be less than a factor of 3. The current observational uncertainties preclude
use of the scaling factor to discriminate between broad-line region models.
