Top-quark mass measurements at the LHC

The top-quark mass $m_{\rm t}$ is one of the fundamental parameters of the standard model (SM) of particle physics. The CDF and D0 collaborations already performed very precise measurements of $m_{\rm t}$. Since the ATLAS and CMS collaborations already have a very large sample of top quark pairs available for analysis, they are producing results with increasing precision. An overview of the most recent measurements of $m_{\rm t}$ by ATLAS and CMS is given, using up to 4.7fb$^{-1}$ of data in different $\rm t \bar{t}$ decay channels. The measurement of the mass difference between top and antitop quarks is also shown. Finally, the combination of the individually measured $m_{\rm t}$ values is discussed, together with an outlook for future $m_{\rm t}$ measurements.