A serial harvest trial investigating growth characteristics of calf-fed Holstein steers (n = 115; initial BW = 449.2 ± 19.9 kg) was conducted in 28 d intervals starting at 226 d on feed (DOF) and ending at 534 DOF. Five steers were slaughtered on d 226 and utilized as a point for growth modeling. Remaining cattle (110 steers) were randomly allocated to harvest endpoint (10 cattle per slaughter day; 254, 282, 310, 338, 366, 394, 422, 450, 478, 506, and 534 DOF) with one-half of each group receiving zilpaterol hydrochloride (ZH) for 20 d followed by a 3 d withdrawal. Shrunk BW (SBW, kg) and hot carcass weight (HCW, kg) were utilized to predict empty body weight, kg (EBW). Feeding performance {dry matter intake (DMI, kg), net energy for gain, (NEG, Mcal/kg of diet dry matter), and ZH supplementation} variables were utilized to estimate EBW and empty body fat (EBF, %). For prediction of HCW, a 2 variable equation was developed with an R² of 0.946 (P < 0.01) and root mean square error (RMSE) of 20.13 {HCW = −41.44 + (0.6637 × SBW) + (12.974 × ZH); 1 = 20-d supplementation, 0 = 0-d supplementation}. For prediction of EBW, an equation with an R² of 0.942 (P < 0.01) and RMSE of 29.9 was developed {EBW = 57.6232 + (1.39280 × HCW) – (11.0994 × ZH)}. Utilizing feeding performance data, a model with an R² of 0.919 (P < 0.01) and RMSE of 35.2 was developed for prediction of EBW {EBW = −1547.34 + (1.19 × DOF) + (21.13 × DMI) + (1005.73 × NEG) + (18.87 × ZH)}. To predict EBF using feeding performance variables, a 4 variable equation was developed with an R² of 0.621 (P < 0.01) and RMSE of 2.9 {EBF = 0.7769 + (0.0003 × DOF) + (0.0046 × DMI) – (0.4346 × NEG) – (0.0167 × ZH)}. Several variables available to calf-fed Holstein producers may be implicated for use in predictive models related to finishing performance and composition of gain for calf-fed Holstein steers.