  The prospects for electroweak precision measurements at the Future Circular
Collider with electron-positron beams (FCC-ee) are discussed. The Z mass and
width, as well as the value of the electroweak mixing angle, can be measured
with very high precision at the Z pole thanks to an instantaneous luminosity
five to six order of magnitudes larger than LEP. At centre-of-mass energies
around 160 GeV, corresponding to the WW production threshold, the W mass can be
determined very precisely with high-statistics cross section measurements at
several energy points. Similarly, a very precise determination of the top mass
can be provided by an energy scan at the $\mathrm{t \bar t}$ production
threshold, around 350 GeV.
