Overview of the Cosmic Ray studies with the KM3NeT detectors

The KM3NeT Collaboration is currently deploying two neutrino telescopes deep in the Mediterranean Sea. Both detectors share the same technology but are different in size due to their different physics goals. The KM3NeT/ARCA telescope is located at about 3.5 km depth off-shore Sicily, Italy, while KM3NeT/ORCA is at about 2.5 km depth close to Toulon, France. The detectors are currently taking data while being under construction, with 51 and 33 lines installed at the ARCA and ORCA sites, respectively. In this contribution, studies of atmospheric muons and neutrinos using KM3NeT data are presented. A measurement of atmospheric muon neutrino flux is reported. Several analyses with down-going atmospheric muons related to cosmic ray physics and extensive air showers are described. Finally, the analysis of atmospheric muon data for calibration purposes in KM3NeT is presented.