Twenty four male Baladi calves of 228 kg average live body weight (LBW) were divided into four groups. Animals were fed according to Shehata (1976) allowances (T₁), animal heart girth (HG)x0.032 (T₂), animal HGx0.034 (T₃), and animal HGx0.036 (T₄). The nutrients digestibility and serum total protein, albumin and urea-N concentrations of the treatments were gradually increased from T₁ to T₄. Also, the nutrients digestibility and serum total protein, albumin, globulins, A/G ratio and urea-N were increased with age progress. Daily weight gain and HG gain in T₃ were significantly higher than T₁. The economic efficiency in T₂ was higher than other treatments. The results showed that the T₂ was the best treatment. Every cm of HG in (T₂) consumed 0.066, 0.056, 0.007, 0.032 and 0.040kg /cm from DM, OM, CP, SE and TDN, respectively. Therefore, the nutrients requirements of male Baladi calves can be determined by the following equation: DM requirement  (kg/head/day) = Animal HG x 0.066 OM requirement  (kg/head/day) = Animal HG x 0.056 CP requirement    (kg/head/day) = Animal HG x 0.007 SE requirement    (Kg/head/day) = Animal HG x 0.032 TDN requirement (Kg/head/day) = Animal HG x 0.040 Or:-      DM requirement  (kg/head/day) = Animal HG / 15.1 OM requirement  (kg/head/day) = Animal HG / 17.8 CP requirement    (kg/head/day) = Animal HG / 143.4 SE requirement    (Kg/head/day) = Animal HG / 31.1 TDN requirement (Kg/head/day) = Animal HG / 24.8 The results of this study showed that the small holder can use the following equations to calculate the feed quantity for male Baladi calves which fed on concentrate feed muxture (CFM), berseem hay and wheat straw (at a roughage / concentrate ratio of 55:45) : The requirement of CFM (kg/head/day) = Animal HG x 0.040 or Animal HG/25.5 The requirement of berseem hay(kg/head/day) = Animal HGx0.015 or Animal HG/69.7 The requirement of wheat straw (kg/head/day) = Animal HGx0.019 or Animal HG/54.1