Calorimetry at the LHC

The Large Hadron Collider (LHC) is the new CERN accelerator that will provide proton proton collisions at $\sqrt{s}=$14~TeV. It will have two general purpose experiments: ATLAS and CMS, and two dedicated experiments: Alice, to study heavy ion collisions, and LHCb, to study b physics. The LHC is an explorative machine built to search for the Higgs boson and physics beyond the Standard Model. Calorimeters play a crucial role in these searches. In particular the electromagnetic calorimeter is fundamental in the search for the SM Higgs boson, depending on the mass range, either in the two photon decay channel or in the four leptons channel. Hadron calorimeters are important for super-symmetric particles searches where jets and missing transverse energy are expected. We present a review of the LHC experiments calorimeters and their expected performance.