This research aimed to assess the antioxidant capabilities against DPPH, as well as determine the overall phenolic and flavonoid contents in extracts of abrus precatorius leaves. Different extracts of abrus precatorius leaves were successively prepared using methanol, ethanol, petroleum ether, and distilled water. The DPPH antioxidant capacity of methanol extracts was highest with a low IC50 value of 62.86±0.68µg/mL. Ethanol, water, and petroleum ether extracts also showed significant antioxidant activity with IC50 values of 89.66±0.51, 78.67±0.35, 142±4.26 μg/mL. We observed a significantly higher total phenolic content of 34.67± 2.52 gallic acid equivalent ⁄ g dry extract and total flavonoid content of 27.55±1.84 mg quercetin equivalent/g dry extract for methanolic leaves extract than others. The phenolic content of ethanol and water extract is close enough (22.19±1.45, 26.35±1.65 gallic acid equivalent ⁄ g dry extract). The flavonoid content of ethanol, water, and petroleum ether extract was found as 14.43±1.35, 20.84±1.97, 1.6±0.41 mg quercetin equivalent/g dry extract. These findings will aid in future studies attempting to explore medicinal agents from the abrus precatorius plants of Bangladesh.