#### How to calculate the weight of reinforcement/steel bars of ...

May 23, 2017 · Weight (W)= πD²/4 x L x 7850. We know the unit weight of rod is 7850 kg/m³. But there are two conflicting unit in the above formula. Those are D is in millimeter (as we get the rod as millimeter, such as 16mmø, 20mmø etc.) and unit weight of rod is in m³ (kg/m3).

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