LHCb impact on CKM fits

The LHCb experiment has almost completed its installation phase, and will soon enter the scene of B-Physics by bringing new key measurements to the search for New Physics effects in the flavour sector. Onthe onehandLHCb willimprovethe existing measurementsprovidedby theB-factories, in particular the angle, and on the other hand will provide new precise measurements peculiar to hadronic machines, such as the Bs mixing phase and the branching fraction of very rare decays like the $B_s$. $\mu^+, \mu^-$, i.e. in a sector unaccessible to the B-factories and where the Tevatron cannot make high precision measurements. In this paper first a summary of the LHCb performance on the most important measurements is recalled, then an estimate of their impact on CKM fits in the Standard Model and beyond is drawn.