Jul 10, 2011· There is a simple formula to calculate the weight as follows. Section Weight as per IS 1786 Item square /162 = kg/ mtr weight For Example – calculation of 8 mm and 16 mm TMT BARS will be as follows : 8 X 8 / 162 = kg/mtr weight 16 X16 / 162 = kg/mtr weight. Reply Delete