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Ten Indian herbs （Manjisth, Tagar, Kulfa, Khuskhus, Gokharu, Carrot, Kasni, Bathua, Soya ke Beej, Pudina）, popularly used for medicinal purpose, were extracted in sonicator by methanol and water for the estimation of polyphenols and flavonoids. Antioxidant capacities （AOC） of extracts were evaluated based on their ability to scavenge the DPPH radical and FRAP Assay. The results showed that methanolic extract of all the plant materials had very high antioxidant activity. Amongst them, Pudina extract in the methanol showed highest value of AOC by both FRAP and DPPH methods （33 percent and 1.36 mg QEq / 100 g）. Total phenol and flavonoids content were also evaluated for these extracts. It varied from 0.8736 to 6.3918 mg GAE / 100 g and 0.3642 to 1.9876 mg QE / 100 g. Total ash content and acid insoluble content of soya showed highest value i.e. 14.55 percent and 92.92 percent.
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