This research aimedat generating and evaluating prediction equations to estimate metabolizableenergy values in poultry offal meal. The used information refers to values ofapparent and true metabolizable energy corrected for nitrogen balance (AMEnand TMEn) and for chemical composition of poultry offal meal. The literaturereview only included published papers on poultry offal meal developed in Brazil,and that had AMEn and TMEn values obtained by the total excreta collection methodfrom growing broiler chickens and the chemical composition in crude protein(CP), ether extract (EE), mineral matter (MM), gross energy (GE), calcium (Ca)and phosphorus (P). The general equation obtained to estimate AMEn values ofpoultry offal meal was: AMEn = -2315.69 + 31.4439(CP) + 29.7697(MM) + 0.7689(GE)- 49.3611(Ca), R2 = 72%. For meals with high fat contents (higherthan 15%) and low mineral matter contents (lower than 10%), it is suggest theuse of the equation AMEn = + 3245.07 + 46.8428(EE), R2 = 76%, andfor meals with high mineral matter content (higher than 10%), it is suggestthe equations AMEn = 4059.15 - 440.397(P), R2 = 82%. To estimatevalues of TMEn, it is suggested for meals with high mineral matter content theequation: TMEn = 5092.57 - 115.647(MM), R2 = 78%, and for those withlow contents of this component, the option is the equation: TMEn = 3617.83 -15.7988(CP) - 18.2323(EE) - 96.3884(MM) + 0.4874(GE), R2 = 76%.
