Background: Fluid management is crucial during the first 24 hours after a burn injury due to different systemic responses of the body Objective: To compare the outcomes of patients with partial- or full-thickness burns initially managed using the Parkland (PRK) formula with those initially managed using the Rizal D. Aportadera (RDA) formula, a fluid resuscitation formula with added sodium bicarbonate. Design: Cohort study. Participants: 181 male and female patients, aged 7 months to 78 years, with partial- or full-thickness burns. Setting: RDA Burn Unit of Southern Philippines Medical Center, Davao City, from January 2008 to December 2018. Main outcome measures: Proportions of patients with prolonged hospital stay, sepsis, and death; odds ratio of having the outcomes for selected factors. Main results: Of the 126 males and 55 females, with overall mean age 25.70 ± 20.92 years, included in this study, 175 (96.69%) had partial-thickness burns and 6 (3.31%) had full-thickness burns. Among the patients, 108/181; 59.67% were managed with the PRK formula, while 73/181 (40.33%) were managed with the RDA formula during fluid resuscitation. Compared to the PRK group, the RDA group had significantly lower mean length of hospital stay (11.67 ± 9.69 days vs 17.22 ± 20.45 days; p=0.0317) and lower proportion of patients with prolonged hospital stay (2/73, 2.74% vs 13/108, 12.04%; p=0.0287). Full-thickness burns had independent association with prolonged hospital stay, while major burns had independent association with death. Conclusion Compared to patients in the PRK group, those in the RDA group had significantly shorter hospital stay. Full-thickness burns and major burns were independently associated with prolonged hospital stay and death, respectively.