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We study a hundred of galaxies from the spectroscopic Sloan Digital SkySurvey with individual detections in the Far-Infrared Herschel PACS bands (100or 160 $\mu$m) and in the GALEX Far-UltraViolet band up to z$\sim$0.4 in theCOSMOS and Lockman Hole fields. The galaxies are divided into 4 spectral and 4morphological types. For the star forming and unclassifiable galaxies wecalculate dust extinctions from the UV slope, the H$\alpha$/H$\beta$ ratio andthe $L_{\rm IR}/L_{\rm UV}$ ratio. There is a tight correlation between thedust extinction and both $L_{\rm IR}$ and metallicity. We calculateSFR$_{total}$ and compare it with other SFR estimates (H$\alpha$, UV, SDSS)finding a very good agreement between them with smaller dispersions thantypical SFR uncertainties. We study the effect of mass and metallicity, findingthat it is only significant at high masses for SFR$_{H\alpha}$. For the AGN andcomposite galaxies we find a tight correlation between SFR and L$_{IR}$($\sigma\sim$0.29), while the dispersion in the SFR - L$_{UV}$ relation islarger ($\sigma\sim$0.57). The galaxies follow the prescriptions of theFundamental Plane in the M-Z-SFR space.

Herschel Far-IR counterparts of SDSS galaxies: Analysis of commonly used Star Formation Rate estimates