Abstract submitted to the
         The 2007 Europhysics Conference on High Energy Physics
                  19-25 July 2007, Manchester, England
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                Precision measurements of alphas at HERA



                      H1 and ZEUS Collaborations





                                 Abstract


The precision measurements of the strong coupling, alphas,
and its energy-scale dependence performed at HERA by the H1 and ZEUS
Collaborations are presented. A new HERA average value is also
presented using recent inclusive-jet cross-section measurements in
neutral current deep inelastic scattering at high Q^2. The combined
HERA determinations of alphas at various energy scales clearly show
the running of the coupling from these jet data alone and are in
agreement with the prediction of perturbative QCD.