Civil & Finish Calculators Keifa Engineering & Architectural Tools
Structure

Rebar Weight Calculator

Calculate rebar weight in tons by diameter and length or by reinforcement ratio (kg/m³), with commercial bar counts and waste allowance.

Structural Rebar & Metallurgy

Reinforcing Steel (Rebar) Calculator

Estimate rebar steel quantity by concrete element volume (reinforcement ratio) or bar bending schedule with standard 12m bars using the engineering formula (d²/162).

This is a preliminary estimate only and may vary depending on structural design, code requirements and project specifications.

Instant Results & Bill of Quantities
Total Steel Weight 0.00 طن 0 kg including lap waste
Commercial 12m Rebars 0 سيخ تجاري Standard commercial bar length: 12 meters
Estimated Steel Cost 0 SAR Based on entered ton price

Weight Schedule & Binding Wire Breakdown:

Item Weight / Quantity Formula & Specifications

Result type: Preliminary Estimate

Formulas & Assumptions

Formulas used

  • W_unit = d² / 162 (kg/m)Unit weight of a bar by diameter
  • W_total = L_total × W_unitTotal rebar weight
  • N_bars = ⌈ L_total / L_bar ⌉Commercial bars required
  • W_estimate = V_concrete × rPreliminary estimate by reinforcement ratio (kg/m³)

Assumptions & reference values

  • Industry estimatePreliminary ratios: footings 80–120, columns 120–250, slabs 80–150, beams 110–140 kg/m³.
  • Default valueDefault commercial bar length 12 m (6 m and 9 m available).
  • Editable assumptionLap splice / waste allowance 10%, editable.
  • Industry estimateBinding wire ≈ 10 kg per tonne of rebar.
  • Industry estimateConcrete spacers ≈ 80 pieces per tonne.

Notices: This result is intended for quantity estimation. Verify quantities against approved drawings and project specifications before procurement or construction.

This calculator provides quantity and preliminary cost estimation. Structural design, material specifications and final quantities must be verified against project drawings, specifications and applicable engineering standards.