Steel Weight Calculator & BBS Indent

Free Online Steel Weight Calculator for Indian civil engineers and fabricators. Calculate TMT rebars (Fe500D/Fe550), MS plates, ISMC channels, ISMB beams, angles, pipes, bundle counts, and live ₹/kg cost.

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How to Use Steel Weight Calculator & BBS Indent

  1. Select your structural steel profile: TMT rebar (IS 1786), MS plate, chequered plate, flat patti, angle (ISA), channel (ISMC), beam (ISMB), hollow section (SHS/RHS), or round pipe.
  2. Choose the metal grade or density (TMT Fe 500D/550D, MS E250, High Tensile E350, SS 304/316, Aluminium, Brass, Copper).
  3. Pick standard BIS presets (e.g. ISMC 100, ISMB 150, ISA 50x50x5, 12mm TMT) or enter custom dimensions.
  4. Specify length (standard 12m TMT or 6m structural section) and piece quantity or full factory bundle count.
  5. Click 'Add to Steel Takeoff' to compile a multi-item Bill of Materials (BOM), download a PDF Cutting Requisition, or share to WhatsApp.

Standard Indian Steel Profiles & IS Code Standards

Indian civil and structural fabrication adheres to rigorous Bureau of Indian Standards (BIS) specifications: - **IS 1786**: High-strength deformed steel bars and wires for concrete reinforcement (Fe 415, Fe 500, Fe 500D, Fe 550D, Fe 600). - **IS 2062**: Hot rolled medium and high tensile structural steel plates, strips, and flats (MS E250 Gr. A/B/C, E350). - **IS 808**: Dimensions for hot rolled steel beam, column, channel (ISMC), and angle (ISA) sections. - **IS 4923**: Hollow steel sections for structural use (Square Hollow Sections - SHS and Rectangular Hollow Sections - RHS). - **IS 1239 / IS 1161**: Mild steel tubes, tubulars, and circular hollow sections across Light (Class A), Medium (Class B), and Heavy (Class C) schedules.

Complete TMT Rebar Weight & Bundle Packaging Chart (IS 1786)

| Diameter (mm) | Weight (kg/m) [D²/162.2] | Weight per 12m Bar (kg) | Standard Pieces / Bundle | Bundle Weight (kg) | |---|---|---|---|---| | **6 mm** | 0.222 kg/m | 2.66 kg | 20 pcs | 53.28 kg | | **8 mm** | 0.395 kg/m | 4.74 kg | 10 pcs | 47.40 kg | | **10 mm** | 0.617 kg/m | 7.40 kg | 7 pcs | 51.83 kg | | **12 mm** | 0.888 kg/m | 10.66 kg | 5 pcs | 53.28 kg | | **16 mm** | 1.578 kg/m | 18.94 kg | 3 pcs | 56.81 kg | | **20 mm** | 2.466 kg/m | 29.59 kg | 2 pcs | 59.18 kg | | **25 mm** | 3.853 kg/m | 46.24 kg | 1 pc | 46.24 kg | | **28 mm** | 4.834 kg/m | 58.01 kg | 1 pc | 58.01 kg | | **32 mm** | 6.313 kg/m | 75.76 kg | 1 pc | 75.76 kg | | **36 mm** | 7.990 kg/m | 95.88 kg | 1 pc | 95.88 kg | | **40 mm** | 9.865 kg/m | 118.38 kg | 1 pc | 118.38 kg |

Structural Steel Mathematical Weight Formulas

All structural profile weights are derived from cross-sectional area and density (ρ = 7,850 kg/m³): - **TMT Rebars**: `W (kg/m) = D² / 162.2` (where D is diameter in mm). - **Flat Bars (Patti)**: `W (kg/m) = Width (mm) × Thickness (mm) × 0.00785`. - **MS Plates**: `Total Weight (kg) = Length (m) × Width (m) × Thickness (mm) × 7.85`. - **Equal Angles (ISA)**: `W (kg/m) = (2A - t) × t × 0.00785` (where A is leg size, t is thickness). - **Unequal Angles**: `W (kg/m) = (A + B - t) × t × 0.00785`. - **Square Hollow Section (SHS)**: `W (kg/m) = 4 × (Side - t) × t × 0.00785`. - **Rectangular Hollow Section (RHS)**: `W (kg/m) = 2 × (Width + Height - 2t) × t × 0.00785`. - **Circular Pipes**: `W (kg/m) = (OD - t) × t × 0.02466`.

TMT Rebar Grades & BIS Applications

- **Fe 415**: Older standard, suitable for small residential single-story homes and non-critical RCC elements. - **Fe 500 / Fe 500D**: The standard benchmark in modern Indian construction. 'Fe 500D' provides high ductility (min 16% elongation) engineered to absorb seismic energy during earthquakes (IS 13920 compliant). - **Fe 550 / Fe 550D**: High-tensile steel designed for multi-story towers, bridge piers, flyovers, and heavy industrial slabs. - **Fe 600**: Ultra-high-strength steel used in large dams, marine retaining walls, expressways, and mega-infrastructure. - **CRS (Corrosion Resistant Steel)**: Copper and chromium alloyed rebars suited for coastal areas, ports, and high-salinity groundwater zones.

Frequently Asked Questions

How is TMT rebar steel weight calculated per meter using the D²/162 formula?
Weight (kg/m) = D² / 162.2, where D is the nominal diameter in millimeters. For example, a 12mm bar weighs (12 × 12) / 162.2 = 0.888 kg/m. A standard 12-meter (40 ft) length of 12mm TMT weighs 0.888 × 12 = 10.66 kg.
How many pieces of TMT steel bars are in one factory bundle?
In Indian trade practice (Tata Tiscon, Jindal Panther, SAIL, JSW): 8mm has 10 pcs/bundle (~47.4 kg), 10mm has 7 pcs/bundle (~51.8 kg), 12mm has 5 pcs/bundle (~53.3 kg), 16mm has 3 pcs/bundle (~56.8 kg), 20mm has 2 pcs/bundle (~59.2 kg), and 25mm+ bars are bundled as single pieces.
What is the standard density of steel and other structural metals?
Mild steel, TMT rebars, and carbon structural steel have a standardized density of 7,850 kg/m³ (0.00785 g/mm³). Stainless steel SS 304 is 7,930 kg/m³, SS 316 is 8,000 kg/m³, Aluminium is 2,700 kg/m³, Copper is 8,960 kg/m³, and Brass is 8,500 kg/m³.
How do you calculate the weight of Mild Steel (MS) plates and chequered plates?
Plain plate weight (kg) = Length (m) × Width (m) × Thickness (mm) × 7.85. For chequered plates with teardrop/diamond embossing (IS 2062), add +2.1 kg/m² to the base plate weight for the raised pattern.
What is the difference between Fe 415, Fe 500, Fe 500D, and Fe 550D TMT bars?
The numbers represent minimum yield strength in MPa (N/mm²). 'D' stands for Super Ductile, offering higher elongation (≥ 16% for Fe 500D vs ≥ 12% for Fe 500) and better seismic earthquake resistance as mandated by IS 13920 and IS 1786:2008.
How is hollow section (SHS / RHS) pipe weight calculated?
For Square Hollow Sections (SHS): Weight (kg/m) = 4 × (Side - Thickness) × Thickness × 0.00785. For Rectangular Hollow Sections (RHS): Weight (kg/m) = 2 × (Width + Height - 2 × Thickness) × Thickness × 0.00785.