Authors: V. Yakovyna, V. Masyukevych This paper is devoted to the overview of main approaches of machine translation, to analysis of existing metrics for machine translation quality estimation. The advantages and disadvantages of these metrics have been revealed. machine translationmachine translation quality estimationreference translationhttps://science.lpnu.ua/sites/default/files/journal-paper/2017/may/2369/yakovinamasyukevicheng.pdf