TMT Steel Rod Weight & Bundle Calculator
Calculate unit weight per meter, single 12-meter rod piece weight, total bundle packaging, and metric ton conversions conforming to IS 1786 Indian Civil Engineering Standards.
Indian Standard IS 1786 TMT Steel Rod Weight Chart & Civil Specifications
Thermo Mechanically Treated (TMT) steel rebar forms the core tension structural element in Reinforced Cement Concrete (RCC) construction. Primary and secondary steel producers in India supply Fe 500D and Fe 550D grades adhering strictly to IS 1786 guidelines for roof slabs, pillars, grade beams, and foundations. During project estimation, link your steel reinforcement requirements with our Concrete & Plaster Mix Planner and masonry estimates using the Red Brick Counter.
1. Complete TMT Steel Bar Diameter Weight & Bundle Chart
Standard unit weights per meter and full 12-meter (approx. 40 feet) length bars conforming strictly to IS 1786 civil benchmarks:
| Bar Diameter (সাইজ) | Weight per Meter (kg/m) | Weight per 12m Bar (kg) | Pieces per Bundle | Primary Structural Use |
|---|---|---|---|---|
| 8 mm | 0.395 kg/m | 4.74 kg | 10 Pieces | Stirrups (Rings) & Slab Distribution Bar |
| 10 mm | 0.617 kg/m | 7.40 kg | 7 Pieces | Roof Slab Main Rebar & Lintels |
| 12 mm | 0.888 kg/m | 10.66 kg | 5 Pieces | Columns, Plinth Beams & Footings |
| 16 mm | 1.578 kg/m | 18.94 kg | 3 Pieces | Heavy Load Columns & Main Beams |
| 20 mm | 2.466 kg/m | 29.59 kg | 2 Pieces | Commercial Pillars & Multi-Storey Slabs |
| 25 mm | 3.853 kg/m | 46.24 kg | 1 Piece | Heavy Foundations & Structural Piers |
| 32 mm | 6.313 kg/m | 75.76 kg | 1 Piece | Industrial High-Rise Infrastructure |
2. Theoretical Derivation of the D Squared over 162 Weight Formula
The standard civil engineering formula to calculate the nominal weight of circular steel rebar per linear meter is derived directly from the standard density of structural steel (7,850 kg/m³):
Weight (kg/m) = (Diameter in mm squared) / 162.28
Where D represents the nominal diameter of the TMT steel rebar in millimeters. Planning residential plot boundary walls or house foundations? Convert your land layout using our Land Area Converter and check credit terms with the Home Loan EMI Matrix.
3. Understanding Manufacturing Tolerances & Site Verification
It is important for civil contractors to note that Indian Standards permit permissible mass variations (rolling tolerances) ranging from plus-minus 3 percent to plus-minus 7 percent depending on the nominal diameter. Therefore, weighbridge readings upon delivery may exhibit minor deviations from theoretical calculations. Always conduct random sample test weighings on site to verify supplier compliance.
Frequently Asked Questions (FAQ)
Clear answers regarding steel rebar calculations, unit weights, and standard packaging.
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