Reinforcement · quantity planning
Rebar Weight and Size Calculator
Estimate plain cylindrical steel mass from diameter, total length and material density.
Your measurements
Example inputs; replace with your measurements.
Method, limits & sources
Mass = π × (diameter ÷ 2)² × total length × density.
The example density is assumed. Deformed-bar nominal mass and size designations should be verified with supplier tables. This does not recommend a bar size.
Worked example & product data
100 m of 12 mm nominal diameter at an assumed 7,850 kg/m³ gives 88.781 kg by cylindrical geometry.
Independent geometry and quantity formulas; external references do not constitute professional review of this implementation.
Keep useful results together
Saved results 0
Saved in this browser. Export before changing devices. Results are snapshots; editing a calculator does not silently change saved items.