  We present a method to compute thermodynamic quantities within functional
continuum frameworks that is independent of the employed truncation. As a proof
of principle, we first apply it to a Nambu-Jona-Lasinio model in mean-field
approximation. Then, we use the method with solutions obtained from a coupled
set of truncated Dyson-Schwinger equations for the quark and gluon propagators
of (2+1)-flavor quantum chromodynamics in Landau gauge to obtain the pressure,
entropy density, energy density, and interaction measure across the phase
diagram of strong-interaction matter. We also discuss the limitation of the
proposed method.
