Comparison of various methods for K-USLE soil erodibility factor determination was the purpose of this work. The used methods were: Wischmeier’s, Wischmeier’s and Smith’s, Monchareonm’s, Wiliams et al., Renard’s et al., Torii’s et al., Stone’s and Hilborn’s, and two methods NRCS. Calculations were carried out for mountainous basin of the Kasińczanka stream, tributary of the Raba river in the Western Carpathians. The obtained results shows that methods used for soil erodibility factor determination differ considerably. Mean values obtained by analyzed methods fluctuated between 0,138 and 0,354 Mg · ha–1 · Je–1.

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