Aim: The aim of this study is to determine the effectiveness of the neutrophil lymphocyte ratio (NLR) and platelet lymphocyte ratio (PLR) in the diagnosis of acute cholecystitis (AC).Material and method: 452 patients diagnosed with AC and 152 patients who admitted to the clinic with biliary colic and elective cholecystectomy have been included this study. Groups compared according to age, gender, white blood cell count (WBC), mean platelet volume (MPV), platelet distribution width (PDW), red blood cell distribution width (RDW), NLR and PLR.Results: There was no significant difference in age between the two groups (p=0.52). Female patients were significantly higher in both control and AC groups (p=0.006). WBC, CRP, NLR, PLR values of the patients in the study group have been observed significantly higher than the control group (p<0.001). The parameter with the highest sensitivity and specificity was found as NLR.Conclusions: NLR and PLR can be considered as a potential inflammatory biomarker for AC, due it being inexpensive and easy calculated.