<prompt> Formula used for estimation of the total iron requirement is4 x body weight kg x Hb deficit gdl4.4 x body weight kg x Hb deficit gdl3 x body weight kg xHb deficit gdl3.3 x body weight kg x Hb deficit gdl  <response>: 4.4 x body weight kg x Hb deficit gdl 269-Dutta 6th 549-KDTEstimation of the total requirement 0.3 x W 100-Hb mg of elemental iron, where W patients weight in pounds, Hb observed haemoglobin concentration in percentage. Additional 50 as to be added for partial replenishment of the body store iron.Examples - The total requirement of iron in anaemic patients weighing 100 lb with haemoglobin 50 is calculated as follows 0.3 x 100 100-50 310 x 100 x 50 1500. Add 50 750 mg. Total iron requirement 2250 mg.Iron requirement mg 4.4 x body weight kg X Hb deficit gdl 