This MA thesis aims at identifying the equivalence of the Russian translations of Sylvia Plath’s poems from the collection “Ariel” (1965) on the basis of the comparative and categorical text analysis. The author studies the peculiarities of manifestation of text categories of theme, chronotope (locality and temporality) and tonality in the original poetic texts as compared to their Russian translations by V. P. Betaki. The identification of categorical markers and their equivalence is proved to be able to define the quantitative degree of translation equivalence to the original. Moreover, the chosen linguistic method contributes to singling out the typological characteristics, which, on their turn, make it possible to describe even more specific divergences between the original and translated texts, as well as the translator’s strategies in general. The results of the research paper can be used as a material for the further categorical method application in the sphere of translation studies.