  A summary of precision measurements sensitive to electroweak, QCD and
quark-flavour effects performed by the ATLAS Collaboration at the Large Hadron
Collider is reported. The measurements are predominantly performed on
proton-proton ($pp$) collision data recorded at a centre-of-mass energy of 13
TeV taken from 2015 to 2018, with an integrated luminosity of up to 140
fb$^{-1}$, with some results based on $pp$ and Pb+Pb data recorded at lower
nucleon centre-of-mass energies. The results cover a wide range of topics, from
strong production of particles at low energies and the spectroscopy of hadrons
to perturbative QCD with hadronic jets and electroweak and strong production of
single and multiple vector bosons. They provide precise measurements of
fundamental constants and stringent tests of the Standard Model with
unprecedented precision and in energy ranges never explored before. They are
also used to explore the proton structure and to perform model-independent
searches for new physics.
