Rebar Weight Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 27, 2026Where published rebar weight tables come from
Steel's density is well-established and consistent across standard rebar grades, making weight directly calculable from bar diameter and length alone - this is exactly how the published rebar weight tables contractors reference every day are derived.
Worked example
For a 12.7mm diameter bar (standard US #4 rebar) across 100m total length:
Weight per meter = 0.9944 kg/m (Total: 99.44 kg)
This result matches the standard published weight for #4 rebar (0.994 kg/m) almost exactly, confirming the calculation against real-world reinforcing steel reference tables used throughout the construction industry.