How the calculation works
The formulas
Bars are treated as solid circular cylinders using nominal diameter. The default density is an approximate editable value; actual delivered mass can differ with tolerances and product specification.
Total length = individual length × count
Mass = π × (diameter in metres)² ÷ 4 × total length × density
Assumptions to check
- No laps, hooks, bends, couplers, or cutting waste are added automatically.
- This is a weight calculator, not reinforcement selection or structural design.
A worked example
Twenty 6 m bars of 12 mm diameter total 120 m. At 7,850 kg/m³, theoretical mass is approximately 106.54 kg.