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We present the calibration between the dust continuum luminosity andinterstellar gas content obtained from the Valpara\'{i}so ALMA Line EmissionSurvey (VALES) sample of 67 main-sequence star-forming galaxies at0.02<$z$<0.35. We use CO(1-0) observations from the Atacama LargeMillimetre/submillimetre Array (ALMA) to trace the molecular gas mass,$M_{\mathrm{H}_{2}}$, and estimate the rest-frame monochromatic luminosity at850 $\mu$m, $L_{\nu_{850}}$, by extrapolating the dust continuum from MAGPHYSmodelling of the far-ultraviolet to submillimetre spectral energy distributionsampled by the Galaxy And Mass Assembly (GAMA) survey. Adopting $\alpha_{\rmCO}$ = 6.5 (K km s$^{-1}$ pc$^{2}$)$^{-1}$, the average ratio of$L_{\nu_{850}}/M_{\mathrm{H}_{2}}$ = (6.4$\pm$1.4)$\times10^{19}$ erg s$^{-1}$Hz$^{-1}$ $\mathrm{M}_{\odot}^{-1}$, in excellent agreement with literaturevalues. We obtain a linear fit of $\log_{10}$($M_{\mathrm{H}_{2}}/\mathrm{M}_{\odot}$) = (0.92$\pm$0.02) $\log_{10}$($L_{\nu_{850}}$/erg s$^{-1}$ Hz$^{-1}$)-(17.31$\pm$0.59). We provide relationsbetween $L_{\nu_{850}}$, $M_{\mathrm{H}_{2}}$ and $M_{\mathrm{ISM}}$ whencombining the VALES and literature samples, and adopting a Galactic$\alpha_{\rm CO}$ value.

VALES: III. The calibration between the dust continuum and interstellar gas content of star-forming galaxies