TMT Bar Weight Chart — Weight per Metre, per Bundle & Size Guide
A complete weight reference for TMT bars from 8mm to 25mm, based on the IS:1786:2008 standard formula, plus AGNIVEER's actual bundle specifications for Fe 550 TMT bars manufactured in Barotiwala, Himachal Pradesh.
Weight per Metre by Diameter
Nominal (theoretical) weight is calculated using the standard formula prescribed by the Bureau of Indian Standards. Actual weight may vary within ±4% BIS tolerance.
| Diameter | Weight per Metre | Weight per 12m Bar (theoretical) |
|---|---|---|
| 8 mm | 0.395 kg/m | 4.74 kg |
| 10 mm | 0.617 kg/m | 7.40 kg |
| 12 mm | 0.888 kg/m | 10.66 kg |
| 16 mm | 1.580 kg/m | 18.96 kg |
| 20 mm | 2.469 kg/m | 29.63 kg |
| 25 mm | 3.858 kg/m | 46.30 kg |
Example: for a 16mm bar, W = 16² ÷ 162 = 256 ÷ 162 = 1.580 kg/m. This formula is specified under IS:1786:2008 by the Bureau of Indian Standards and used industry-wide to calculate theoretical rebar weight.
Pieces per Bundle & Bundle Weight
This is the real-world data used in AGNIVEER's own online weight calculator — the exact bundle specification you'll receive when you order.
| Diameter | Pieces per Bundle | Approx. Bundle Weight |
|---|---|---|
| 8 mm | 18 pcs | ~85 kg |
| 10 mm | 13 pcs | ~92 kg |
| 12 mm | 9 pcs | ~92 kg |
| 16 mm | 5 pcs | ~92 kg |
| 20 mm | 3 pcs | ~92 kg |
| 25 mm | 1 pc | ~46.30 kg |
Accurate Weight, Every Bundle
Under-weight or inconsistent TMT bars are a genuine problem in the unorganised steel market — short weight means you pay full price for less steel. Here's how AGNIVEER protects you:
ISI & BIS Certified
Every AGNIVEER Fe 550 bar is manufactured to IS:1786:2008 specifications and independently tested for weight consistency.
Consistent Bundle Weight
Our bundles are packed to the exact specifications shown above — no short-weighing, batch after batch.
Highest Standard Grade
We manufacture Fe 550 — the highest grade in standard Indian TMT production — for maximum strength per kilogram.
Need Exact Quantities for Your Project?
Use our free online calculator to convert any quantity to kilograms, tonnes or bundles — or talk to our team directly.
Common Questions About TMT Bar Weight
What is the standard weight of a 12mm TMT bar per metre?
A 12mm TMT bar weighs approximately 0.888 kg per metre as per the IS:1786:2008 formula. A standard 12-metre bar therefore weighs approximately 10.66 kg (theoretical).
How is TMT bar weight calculated?
TMT bar weight per metre is calculated using the formula W = D² ÷ 162, where W is weight in kilograms per metre and D is the nominal diameter in millimetres, as specified under IS:1786:2008.
How many pieces of TMT bar are in one bundle?
It varies by diameter since bundles are packed to a similar total weight — for AGNIVEER TMT bars this ranges from 18 pieces per bundle for 8mm down to 1 piece per bundle for 25mm. See the bundle table above or use our online calculator for exact figures.
Does actual TMT bar weight differ from the theoretical weight?
Yes, a small variance is normal — IS:1786:2008 allows a tolerance of approximately ±4% on nominal weight. Bars that are significantly under-weight for their stated diameter are a known quality concern in the unorganised market, which is why buying ISI-certified, BIS-licensed TMT bars from a transparent manufacturer like AGNIVEER matters.