The objective of the study was done to determine the effects of fermented mango juice and fermented mulberry juice on growth performance of broiler chickens, Specifically, it was aimed to find out the following: average initial weight; average final weight; average gain in weight; average daily gain (ADG); average feed consumption (AFC); average feed conversion ratio (FCR); and cost and retum of the study. The study was conducted from March 26, 2022 to May 03, 2022 at San Ildefonso, Magalang, Pampanga. A total of one hundred eighty (180) heads Cobb broilers chicks was used in this study. Randomized Complete Block Design (RCBD) was the experimental design that will be used in the study. The birds were randomly divided into 6 treatments with 3 replication and 30 birds per treatment. Experimental Factor are as follows: Factor A = Fermented Mulberry Leaf Juice (FMLJ) Factor B = Fermented Mango Fruit Juice (FMF5). Experimental Treatment are as follows: AiBi = (control) 100% drinking water, AiB2 = 100 mi fermented mulberry leaf juice per litter water, A1B3 = 200 ml fermented mulberry leaf juice per litter water, A2B, - (control) 100% drinking water, A2B2 = 100 ml fermented mango fruit juice per litter water, and AoBs= 200 ml fermented mango fruit juice per litter water. The results of the study: Initial Weight - broilers supplemented with 100 ml mango FF} with 513 07 had the highest initial weight. Statistical analysis revealed highly significant difference between the amounts of FFJ. Final Weight - broilers supplemented with 200 ml fermented finut suice (FFJ) had highest final weight with an average mean of 1,629 63 grams Statistical analysis revealed highiy significant difference between the amounts of FF] Gain in Weight - broilers supplemented with 200 mi fermented fruit juice (FFJ) had most gain in weight with an average mean of 1,171.20 grams. Statistical analysis revealed significant difference between the amounts of FFJ on the average gain in weight Average Daily Gain - birds supplemented with 200 ml fermented fruit juice (FF)) had the greatest average daily gain in weight with an average mean of 30.82 grams per day. Statistical analysis revealed significant difference between the amounts of FFJ on the average datly gain of the birds. Feed Conversion Ratio - broilers supplemented with 200 ml FFJ had the best feed conversion ratio with an average mean of 1.97 kg feed to produce | kg chicken meat. Statistical analysis revealed significant difference between the amounts of FFJ with regards to feed conversion ratio.