  We investigate the uncertainties for current and future measurements of
electroweak (EW) parameters at hadron colliders. These include the measurement
of the mass of the top quark ($M_T$), the direct measurement of the mass of the
W boson ($M_W^{direct}$), the measurement of the effective EW mixing angle
$\sin^2\theta^{\rm lept}_{\rm eff}$(M$_Z$), and the measurement of the on-shell
EW mixing angle $\sin^2\theta_{W}= 1- M_W^2/M_Z^2$ which is equivalent to an
indirect measurement of the W mass ($M_W^{indirect}$). Reduction of a factor of
2 to 3 in the measurement errors is expected in the future.
