Rebar Weight per Meter — Calculation Guide
Rebar weight per meter ≈ (π × d² / 4) × ρ for solid round bar, or read kg/m tables for standard diameters. Use 7850 kg/m³ for carbon steel rebar.
Reference values
- Density
- 7850 kg/m³ (carbon steel)
- Round bar formula
- kg/m ≈ 0.006165 × d² (d in mm)
- Total
- kg/m × length × quantity
Method
Identify bar diameter
Note nominal diameter (e.g. Ø12, Ø16, Ø20 mm).
Find kg/m
Open the rebar sector or use the rebar calculator.
Multiply by length
Total = kg/m × bar length × number of bars.
Add lap and waste
Add fabrication allowance per project spec.
Ø16 example
Ø16 mm carbon rebar ≈ 1.58 kg/m × 12 m = ~19 kg per bar (verify in calculator).
FAQ
Deformed vs plain?
Weight is based on nominal diameter; ribs add negligible mass.
Bundled weights?
Multiply single-bar weight by count; check mill bundle tags for actual.