An experiment was conducted to determine the effects of different levels of energy on growth performance of crossbred (Indigenous × Holstein Friesian) bull calves. Feeding trial was conducted for sixty days long with twelve numbers of crossbred bull calves having almost similar body weight (115±5 kg) and age (1 year and 9 months). The parameters of energy requirements for crossbred bull calves were feed intake (DM), nutrient intake, changes in body weight, daily live weight changes, feed conversion efficiency, co-efficient of digestibility of different nutrients, nutritive value and requirements of energy for maintenance and growth. Four levels of dietary energy (T_0, T_1, T₂ and T₃) were supplied to the experimental animals for this purpose. The level of ME was T₀ = 17.4 MJ/d as maintenance ration, T₁ = 20.22 MJ/d for 200 g/d targeted LWG, T₂ = 23.37 MJ/d for 400 g/d targeted LWG, T₃ = 27.29 MJ/d for 600 g/d targeted LWG. It was found that the average daily live weight gain in T₁ (290 g) fulfills against the targeted live weight gain (200 g/d). On the other hand, the expected live weight gain for T₂ and T₃ (400 g/ d and 600 g/d) were not fulfill at the end of experiment. The energy requirement for 100 kg body weight of crossbred bull calves was 17.4 MJ d^-1 as maintenance and 15.44 MJ d^-1 required for growth of 200g/ d.