Key takeaways
- Unit weight formula: kg/m = d² / 162 (d in mm).
- Common house-work sizes: 8, 10, 12, 16 mm.
- Confirm final quantity against the Bar Bending Schedule.
Try the calculator
First-pass estimate — confirm against your engineer's mix design and drawing.
Behind the formula
TMT bar unit weight (kg/m) = (d² × π/4 × 7850) / 1000 ≈ d² / 162. This is why 8 mm ≈ 0.395 kg/m and 12 mm ≈ 0.888 kg/m.
Frequently asked questions
Is this bundle-accurate?
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It's exact for the theoretical unit weight; actual mill weight can vary within IS tolerances. Confirm on invoice.
How much TMT for a 1000 sq ft house?
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Roughly 3.8–4.5 metric tonnes across 8/10/12/16 mm — depends on the actual structural drawing.
Written by
Written by the shop-floor team at Harsh Traders (Mandi Binaganj, Guna, MP) — authorised Bangur Cement and SEL Tiger 550D TMT dealer. Reviewed against day-to-day contractor and homeowner experience across the Chachaura tehsil.
Mandi Binaganj, Chachaura-Binaganj, Guna (MP)Related reading
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