Metal · Weight
Steel round bar and TMT rebar weight per metre
A 12 mm steel round bar weighs 0.888 kg per metre (0.597 lb/ft). For any diameter: kg/m = d² ÷ 162.2, with d in mm, because the density is 7850 kg/m³ (carbon steel). Rebar standards (EN 10080, IS 1786) define the nominal mass of ribbed bar from the nominal diameter with the same density, so the chart holds for TMT and B500 bars too.
Steel round bar weight chart
| Size, mm | kg/m | lb/ft | 6 m bar, kg | 12 m bar, kg |
|---|---|---|---|---|
| Ø 6 mm | 0.222 | 0.149 | 1.332 | 2.663 |
| Ø 8 mm | 0.395 | 0.265 | 2.368 | 4.735 |
| Ø 10 mm | 0.617 | 0.414 | 3.699 | 7.398 |
| Ø 12 mm | 0.888 | 0.597 | 5.327 | 10.65 |
| Ø 14 mm | 1.208 | 0.812 | 7.250 | 14.50 |
| Ø 16 mm | 1.578 | 1.061 | 9.470 | 18.94 |
| Ø 18 mm | 1.998 | 1.342 | 11.99 | 23.97 |
| Ø 20 mm | 2.466 | 1.657 | 14.80 | 29.59 |
| Ø 22 mm | 2.984 | 2.005 | 17.90 | 35.81 |
| Ø 25 mm | 3.853 | 2.589 | 23.12 | 46.24 |
| Ø 28 mm | 4.834 | 3.248 | 29.00 | 58.00 |
| Ø 30 mm | 5.549 | 3.729 | 33.29 | 66.59 |
| Ø 32 mm | 6.313 | 4.242 | 37.88 | 75.76 |
| Ø 36 mm | 7.990 | 5.369 | 47.94 | 95.88 |
| Ø 40 mm | 9.865 | 6.629 | 59.19 | 118.38 |
| Ø 45 mm | 12.485 | 8.389 | 74.91 | 149.82 |
| Ø 50 mm | 15.413 | 10.357 | 92.48 | 184.96 |
Each size opens the calculator with it, for any length, quantity or material.
- Density 7850 kg/m³, the calculator's typical value for carbon steel; a figure from the supplier's data sheet beats it.
How it is worked out
Weight per metre = area of the section × density. A round bar's area is π × d² ÷ 4, so kg/m = π × d² ÷ 4 × 7850 ÷ 10⁶ = d² ÷ 162.2. A piece is that times its length in metres.
Other weight charts
Steel round bar and TMT rebar weight per metre · Steel plate and sheet weight per square metre · Aluminium sheet and plate weight per square metre · Stainless steel sheet weight per square metre (304) · Aluminium round bar weight per metre · Steel square tube weight per metre · Steel round tube and pipe weight per metre · Steel flat bar weight per metre · Steel equal angle weight per metre
Questions people ask
- How much does Ø 12 mm mm steel round bar weigh per metre?
- 0.888 kg (0.597 lb per foot). A 12 m length weighs 10.65 kg.
- What is the weight of Ø 12 mm mm steel round bar?
- 0.888 kg per metre. A 12 m length, 10.65 kg.
- How do you calculate the weight of steel round bar?
- Diameter squared divided by 162.2 gives kg per metre, with the diameter in mm. It comes from π × d² ÷ 4 × 7850 kg/m³.