Ageratum conyzoides L., belonging to the family Asteraceae, is an annual herbaceous plant and is an invasive weed. It contains bioactive compounds that are reported to possess therapeutic properties. The species has been studied widely owing to its biological properties and its potential application in medicine and agriculture. It is used in the treatment of burns and wounds, arthrosis, malaria, asthma, leprosy and dermatitis. It also has insecticidal activity against a range of major pests of field crops. Chromatographic analyses have identified pyrrolizidine alkaloids, phenolic acids, coumarin and polymethoxyflavones. The present study was conducted to determine the qualitative and quantitative properties of the crude extracts of the leaves. Extracts were prepared by using petroleum ether, chloroform and methanol solvents. The yield of extract was calculated for all the three solvents and they are studied for qualitative analysis of phytochemical compounds and quantitative analysis. The qualitative phytochemical tests exhibited the presences of alkaloids, carbohydrates, phenols, tannins, steroids, terpenoids, glycosides, saponins, and amino acid. Quantitative analysis suggests the presence of tannins, alkaloids and phenols in the leaves and this can be utilized for further investigations.