Electroweak Physics Measurements at the LHC

Whereas often quoted as a discovery collider, LHC will also allow for precise measurements. In particular, in the electroweak sector, the determination of the masses of the top quark and the W boson will benefit from high statistics and new methods. The first inverse picobarns will allow us to test the analysis methods, which will be described. Then expected sensitivities will be shown, corresponding to statistics of 1 to 10 fb^{-1}. We will show how improved accuracies on the two parameters can help in the indirect determination of the Higgs boson mass.