This study used experimental approach in coming up with substitute material for charcoal briquettes as alternative fuel. Three agricultural waste were utilized and compared in the study, namely Rice (Oryza sativa) husk, Corn (Zea mays) Stem and Husk, and Giant Taro (Alocasia macrorrhizos) peels. It was found out that giant taro charcoal briquettes had the shortest duration recorded under the boiling ability test, allowing water to reach boiling point at the shortest amount of time though it was noted that among three alternatives, it burned out easily to ash. No significant differences were noted in terms of burning time and boiling ability. This study showed the potential of agricultural waste for bioconversion, to be specific carbonization as material for charcoal briquettes. It is looking into reusing agricultural waste and turning it for potential income source for the farmers. It could lessen the demand for hard wood charcoals thus minimizing the threat for deforestation. Carbonization can create smokeless fuel which could lessen the damage to the ozone layer further contributing the prevention of global warming. The study could be comprehensive by recalibration of proportion for charcoal briquettes to determine the perfect consistency for maximum effect. Further studies and a more in-depth investigation of alternative sources and reusing agricultural waste is recommended.