Free tool
TMT Bar Weight Calculator
Work out the weight of TMT bars, or how many bars make a tonne. सरिया का वज़न निकालें।
Formula: weight per metre (kg) = d² ÷ 162, where d is the diameter in mm. Actual weight can vary slightly within IS 1786 tolerances. Final billing is on actual weight.
Reference
TMT bar weight chart
Standard weights for 12-metre bars, rounded.
| Diameter | kg per metre | kg per 12 m bar | Bars per tonne (approx.) |
|---|---|---|---|
| 6 mm | 0.222 | 2.67 | 375 |
| 8 mm | 0.395 | 4.74 | 211 |
| 10 mm | 0.617 | 7.41 | 135 |
| 12 mm | 0.889 | 10.67 | 94 |
| 16 mm | 1.580 | 18.96 | 53 |
| 20 mm | 2.469 | 29.63 | 34 |
| 25 mm | 3.858 | 46.30 | 22 |
| 28 mm | 4.840 | 58.07 | 17 |
| 32 mm | 6.321 | 75.85 | 13 |
| 36 mm | 8.000 | 96.00 | 10 |
| 40 mm | 9.877 | 118.52 | 8 |