TMT bar weight chart per metre, per 12 m bar and per tonne.
Choose a published nominal-mass table for TMT bars and reinforcement wire. Calculate kg per metre, weight for your length and quantity, and whole bars within or above a target tonnage. Standard sizes cover 4–50 mm; SAIL’s separate range includes 22 mm.
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Clear size-by-size PDFs on Steel Impex India letterhead, with our contact details and watermark. Pipe charts cover NPS 1/8 to 40 inches in three pages with separate wall thickness and kg/m columns.
Check the material density, units and reference source printed on the chart. Nominal values are not a stock guarantee, material certificate or pressure rating. Browse every chart and source edition.
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Download PDF: TMT / saria nominal weight charts
TMT bar weight chart: 4–50 mm standard sizes
These are the nominal masses in IS 1786:2008 Table 1, with 45 mm and 50 mm added by Amendment 1 (November 2012). The 4 mm and 5 mm entries belong to the standard bar/wire range; they are not a claim of commonly stocked straight TMT bars. The standard reference is separate from SAIL’s published range.
IS 1786:2008 + Amendment 1 · nominal mass
Table 1 and Amendment 1 (2012), PDF pages 14 and 8. Fifteen nominal bar/wire sizes from 4 to 50 mm. Later BIS product-manual status checked; this is not a draft table. Source
| Diameter | kg/m | 12 m bar, kg | Whole bars within 1 tonne | Whole bars for at least 1 tonne | kg/ft |
|---|---|---|---|---|---|
| 4 mm | 0.1 | 1.188 | 841 | 842 | 0.0302 |
| 5 mm | 0.15 | 1.848 | 541 | 542 | 0.0469 |
| 6 mm | 0.22 | 2.664 | 375 | 376 | 0.0677 |
| 8 mm | 0.4 | 4.740 | 210 | 211 | 0.1204 |
| 10 mm | 0.62 | 7.404 | 135 | 136 | 0.1881 |
| 12 mm | 0.89 | 10.656 | 93 | 94 | 0.2707 |
| 16 mm | 1.58 | 18.960 | 52 | 53 | 0.4816 |
| 20 mm | 2.47 | 29.640 | 33 | 34 | 0.7529 |
| 25 mm | 3.85 | 46.200 | 21 | 22 | 1.1735 |
| 28 mm | 4.83 | 57.960 | 17 | 18 | 1.4722 |
| 32 mm | 6.31 | 75.720 | 13 | 14 | 1.9233 |
| 36 mm | 7.99 | 95.880 | 10 | 11 | 2.4354 |
| 40 mm | 9.86 | 118.320 | 8 | 9 | 3.0053 |
| 45 mm | 12.49 | 149.880 | 6 | 7 | 3.8070 |
| 50 mm | 15.42 | 185.040 | 5 | 6 | 4.7000 |
SAIL TMT · April 2022 brochure
Rationalised-size table, PDF page 2. Includes 22 mm by producer reference; 40 mm is printed as 9.85 kg/m. Catalogue listing is not a stock guarantee. Source
| Diameter | kg/m | 12 m bar, kg | Whole bars within 1 tonne | Whole bars for at least 1 tonne | kg/ft |
|---|---|---|---|---|---|
| 6 mm | 0.22 | 2.664 | 375 | 376 | 0.0677 |
| 8 mm | 0.4 | 4.740 | 210 | 211 | 0.1204 |
| 10 mm | 0.62 | 7.404 | 135 | 136 | 0.1881 |
| 12 mm | 0.89 | 10.656 | 93 | 94 | 0.2707 |
| 16 mm | 1.58 | 18.960 | 52 | 53 | 0.4816 |
| 20 mm | 2.47 | 29.640 | 33 | 34 | 0.7529 |
| 22 mm | 2.98 | 35.760 | 27 | 28 | 0.9083 |
| 25 mm | 3.85 | 46.200 | 21 | 22 | 1.1735 |
| 28 mm | 4.83 | 57.960 | 17 | 18 | 1.4722 |
| 32 mm | 6.31 | 75.720 | 13 | 14 | 1.9233 |
| 36 mm | 7.99 | 95.880 | 10 | 11 | 2.4354 |
| 40 mm | 9.85 | 118.200 | 8 | 9 | 3.0023 |
Why D²/162 and the published table can differ
D²/162 is a convenient estimate, with D in millimetres. A circular section at 7,850 kg/m³ gives π × D² × 7850 / 4,000,000 kg/m. The standard table uses its published rounded masses. This calculator uses the selected table: 50 bars of 16 mm × 12 m at 1.58 kg/m total 948 kg. It does not silently switch between methods.
How many 12 mm saria rods are in one tonne?
At 0.888 kg/m, one 12 m rod is 10.656 kg. You can fit 93 whole rods within 1,000 kg; 94 rods weigh 1,001.664 kg. Bundle counts vary by mill and packing. Use the actual bundle tag and delivery weight for billing.
TMT mass tolerances: batch, sample and coil
IS 1786:2008 Table 2 distinguishes the test basis. For diameters up to 10 mm, over 10 to 16 mm, and over 16 mm, batch limits are ±7%, ±5% and ±3%. Individual samples have lower limits of −8%, −6% and −4%, with no upper limit specified in that column. Individual coil samples use ±8%, ±6% and ±4%. The sampling method and purchase agreement matter; a whole-truck weighbridge difference alone is not this conformity test.
Fe 500D / Fe 550D bulk buying checklist
Send diameter-wise tonnes or whole bars, required grade, preferred brand if any, straight length or coil, test-certificate requirements and delivery PIN code. Include your town or village, district, nearest transport depot and unloading facilities. Ask for a quotation stating GST, freight, quantity basis, cutting or bending charges, packing and validity. Grade affects the specified properties; it does not change the nominal mass table for the same diameter.
The 2025 BIS document for a fifth revision is a draft, not used as the published mass table here. BIS product manual · Draft revision · Download versioned TMT data · Send a TMT bulk enquiry
Reference basis: Compiled by Steel Impex India. Check each table’s source, product form and delivery condition before use. Sources, calculation methods and corrections.
Frequently asked questions
What does a 12 mm TMT bar weigh?
At the IS 1786 nominal mass of 0.888 kg/m, a 12 m bar weighs 10.656 kg. Actual delivery weight can vary; confirm the billing basis.
How many 12 mm rods make one tonne?
For 12 m rods at 0.888 kg/m, 93 whole rods fit within one tonne. You need 94 rods to reach at least one tonne; these weigh 1,001.664 kg nominal.
Are 45 mm and 50 mm bars included?
Yes. Amendment 1 to IS 1786:2008 added nominal masses of 12.49 kg/m for 45 mm and 15.42 kg/m for 50 mm. Confirm producer availability separately.
Is D squared divided by 162 exact?
No. D²/162 is a practical approximation. The calculator uses the published rounded nominal mass of your selected table so its result matches the displayed reference.
Does Fe 500D weigh more than Fe 550D?
The nominal mass table is the same for a given diameter. Grade specifies material properties; it does not change the nominal mass assigned to that bar size.
How many rods are in a TMT bundle?
Packing varies by producer and diameter. Use the supplier bundle tag and agreed weight basis; a universal bundle-count chart can misstate an order.
How can a trader in a smaller town request bulk TMT bars?
Send diameter-wise quantities, grade, preferred brand, length or coil requirement, town, district, PIN code and nearest transport depot. Ask for freight, GST, unloading, packing and quote validity to be stated.