Resumo. This work aimed to evaluate different taper models in the estimate of the merchantable height and volume and along the bole volumes of Eucalyptus sp., to the obtention of multiproducts. Considering the data of rigorous scaling of trees of Eucalyptus sp. with 16 years-old, it was appraised the models of taper of Demaerschalk (1972), Ormerod (1973), Schöepfer (1966), Hradetzky (1976), Garay (1979) and Biging (1984). Based on graphical analysis of the residues and on the statistics bias (B), average of the differences (MD) and deviation pattern of the differences (DPD), it could be verified that, in the estimate of the merchantable height and volume of the models, Biging, Schöepfer and Hradetzky presented the best results, followed by the models of Garay, which have also shown good results. In general, considering the treatment of the volumes of the logs, the Biging model presented the best resuts.