A simple, reproducible and efficient method for the determination of metformin hydrochloride (MET) was developed and validated. The analysis complied with Beer's law in the concentration range of 8-13 μg/mL at 233 nm for MET. In our study the validation of analytical method for determination of MET by UV in tablets formulation was performed in accordance the parameters including-system suitability, specificity, limit of quantification, limit of detection, linearity of response, accuracy, precision (reproducibility & repeatability), robustness (change of wave length±2 nm).