You can use the same formula, but ensure to verify the density of the rebar with your manufacturer or seller, as it is made of a different material compared to steel.

It would be great if you share the length of the bar.

Thank you for taking the time to read and learn from this article.

This is standard formula applied to all grades.

Hello Mark,
Hope this clears your doubt!

Formula to calculate the weight of bar :

Weight of Bar = Volume of Bar x Density
= (Area x Length) x (7850)
Here, unit of area = mm^2, length = meter, density = kg/m^3.
= ((π/4)D^2 x 1) x (7850)
The diameter of the steel bar is in millimeters so we have to convert the density and length in millimeters.
= ((3.141593/4)D^2 x (1×1000)) x (7850/(1000x1000x1000))
= ((3.141593 x D^2) x 1000 x (7850/(4x1000x1000x1000))
= (3.141593 x D^2 x 1000 x 0.0000019625)
= D^2 x 0.00616225
= D^2/(1/0.00616225)
= D^2/162.2783886 (≈ 162.28)
= D^2/162.28

We will shortly write a detailed post on how to calculate the weight of steel bars. That might help you understand things better. Until then, sign up for the mailing list to ensure you don’t miss a single update.