12国标钢筋一米钢筋等于:0.000888吨。直径是12的钢筋一米的重量是0.888kg,0.888÷1000=0.000888吨,也就是0.000888吨。具体螺纹钢米重表如下:规格 米重(每米重量)12mm 0.88814mm 1.2116mm 1.5818mm 220mm 2.4722mm 2.9825mm 3.8528mm 4.8332mm 6.3136mm 840mm 9.87