Two procedures using semi-purified diet (SPD) and practical diet (PD) were compared to determine the metabolizable energy (ME) in feedstuffs by growing chicks. The reference diet of each procedure was formulated into two categories; one for starch feeds and the other(low protein) for protein feeds. The triplicate ten male chicks of White Leghorn were plotted for each treatment. The chicks two weeks old were fed experimental diets for another two weeks, of which the last three days were allotted for sampling their excreta. The feces were dried and analyzed for calorie, nitrogen, and chromium oxide. The excreted energy and nitrogen were calculated from the ratio of chromium oxide contents in feed and excreta. The ME. value was computed by the proportional method. 1. The ME. of glucose were 3,273 and 2,580 ㎉/㎏ dry matter (DM) when chicks were fed appropriate and low level of protein, respectively. The reason for less ME. values than 3,640 published by foreign researchers might be the impurity of glucose tested. However, the farmer result showed more close to the foreigners than the laters. It was considered that the suitable amount of protein in chick ration should be provided for determining the glucose ME. 2. The ME content in rations of treatments were 2,700∼3,200 ㎉/㎏ DM. The standard deviations from average ME values of SPD were less than those of PD. Therefore, it was believed that the experimental accuracy of PD method might be higher than that of SPD one. 3. The ME for yellow corn were measured as 1994 and 3,027㎉/㎏ air dry matter(ADM) when SPD and PD were employed, respectively. The later result was more similar to the others data than the formers. 4. The ME of wheat from PD procedure brought higher value than that from SPO one, and more similar to the others result. 5. The fish meal showed 2,630 and 2,752 ㎉/㎏ ADM from SPD and PD, respectively. The slightly higher value from the later was more similar to the other values, too. 6. The values from soybean meal represented a reverse trend compared to those from three kinds of feedstuffs above described. Viewing from the accuracy of measurement, similarity of the result to the others, and the expense for the ration formulation, it was believed that the PD method might be recommended for determining the ME content of feedstuffs in condition of Korea.