Practical Formulas to Calculate Steel Weight   Square and rectangle carbon (black) steel tubes: Weight per meter kg/m kg/m = (Oc - 4Wt) * Wt * 0.00785 Oc = outside circuit, Wt = wall thickness For sq. steel tubes: Oc = 4*a For rect. steel tubes: Oc = 2a + 2b   Round alloyed and high alloyed steel tubes Weight per meter kg/m for alloyed tubes Kg/m = (Od - Wt) * Wt * 0.02505 Od = outside diameter Wt = wall thickness   Weight per meter kg/m for carbon tubes kg/m = (Od - Wt) * Wt * 0.02466 Od = outside diameter Wt = wall thickness Weight per meter kg/m for Round bar kg/m = 0.02468 * (D/2)^ D = Diametter in mm         Weight per meter kg/m for Square bar kg/m = 0.031424 * (a/2)^ a = Square dimension in mm           Weight per meter kg/m for Hexagon bar kg/m = 0.0272 * (D/2)^ D = Width across flats in mm             Weight per Linear Foot   Shape Pounds per Foot Round Hexagon Square Flat D2 x 2.67 D2 x 2.945 D2 x 3.4 Thickness (in.) x Width (in.) x 3.4         DISCLAIMER This web site contains information that we believe to be correct at the time of viewing. However, it is distributed upon the express understanding that we, disclaim any and all responsibility for any inadvertent misinformation and for omissions contained herein. Iran Steel Center has gathered the information contained in this web site from many different sources. The characteristics, applications and other information contained are given as a guide. The readers must make their own evaluation based on their own research and more specific information than that supplied by us. We make no guarantees or warranties, either expressed or implied, regarding the accuracy of the information supplied here.