Precision QCD Measurements from ATLAS

Perturbative QCD calculations at next-to-next-to leading order are available for many processes since several years and can be rigorously tested with a large variety of final states. In this talk, we present the latest results from the ATLAS collaboration involving jets and dijets measured at center of mass energies of 13 TeV. All measured cross-sections are compared to state-of-the art theory predictions. Moreover, we present measurements of dijet correlations allowing to test the renormalization group equation and extracting the strong coupling constant. The talk concludes with the latest results of jet-substructure studies at 13 TeV, in particular the measurement of the jet soft-drop mass as a jet-substructure observable which can be predicted with perturbative calculations.