Both of ABTS and DPPH are stable free radicals which dissolve in methanol or ethanol, and their colors show characteristic absorption at wavelength 734 nm or 516 nm, respectively. Colors ABTS and DPPH would be changed when the free radicals were scavenged by antioxidant [6] [12]. In ABTS method, the highest antioxidant activities was given by sample AR3 (ethanolic extract of arumanis mangoe). The result of present study was similar with research by Ling et al. [2] which showed antioxidant activity of ethanol extract of mangoe leaves was higher than its water extract.