The objectives of this paper were: to verify the adequacy of different rainfall erosivity indices, to compare two equations to calculate the rainfall kinetic energy and to estimate the USLE K-factor (soil erodibility) of two soils (Dark - Red Latosol and Red - Yellow Podzolic soil) from the Sete Lagoas (MG) region. There was not a significant difference between the studied equations to calculate rainfall kinetic energy. The EI30 index showed to be a good rainfall erosivity predictor and can continue being used to determine the R-factor for the studied region. The K-factor values for the Dark - Red Latosol and Red - Yellow Podzolic soils from the Sete Lagoas region were 0.002 and 0.033 t h (MJ mm)-1, respectively.
R-factor; K-factor; erosion; universal soil loss equation (USLE)