Background:The anaesthesiologist plans every case based on patient weight and height to calculate medications doses and ventilator parameters.There are many studies in anesthesia that evaluate the concordance between the visual and measured weight and height, finding a 32.8% of difference that could affected the outcomes for overdose or underdose medications (particularly in narrow therapeutic range).Objective: To determine the concordance between self-reported weight and height values with the measured.Methods: It is a concordance study at National Hospital of Colombia, participants (n: 90) adults, 46% male and 53% female, 18-84 years of age (average of 47 years) scheduled for surgeries (NCEPOD 2-3-4).Each participant was asked for their weight and height, then a qualified person determined the measured value.The Pearson correlation coefficient and Lin's concordance correlation coefficient were obtained, and Brad-Altman plot was used for this concordance analysis.Results and Discussion: Pearson correlation coefficient between self-report and objectively measured height and weight: 0.98.Lin's Concordance correlation coefficients were for weight 0.98 (IC95% 0.97-0.99)and for height 0.96 (IC95% 0.95-0.97).Conclusion: Findings provide support for the utility of self-report height and weight, self-reported values can be used in surgical patients that can't be measured.