The calibration and performance of the LHCb Calorimeter system in Run 1 and 2 at the LHC are described. After a brief description of the sub-detectors and of their role in the trigger, the calibration methods used for each part of the system are reviewed. The changes which occurred with the increase of beam energy in Run 2 are explained. The performances of the calorimetry for $gamma$ and $pi^0$ are detailed. A few results from collisions recorded at $sqrt {s}$ = 7, 8 and 13 TeV are shown.
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