Top-quark mass predictions from W,Z masses and Z partial widths

We use recent measurements of the W- and Z-boson masses and the leptonic, hadronic, and total Z widths to constrain the top-quark mass in the standard model, including full radiative corrections. From a maximum-likelihood analysis we find the most likely value of ${\mathit{m}}_{\mathit{t}}$ to be 151 GeV and we obtain the bound ${\mathit{m}}_{\mathit{t}}$≤200 GeV at 95% C.L. based on the central measured value of the Z mass assuming a Higgs-boson mass of 100 GeV and ${\mathrm{\alpha }}_{\mathit{s}}$(${\mathit{M}}_{\mathit{Z}}^2$)=0.12.