6 mm rebar weight
0.222 kg/m · 0.149 lb/ft
6 mm rebar has a nominal diameter of 6 mm and a cross-sectional area of 28.3 mm².
6 mm rebar weight calculator
Weight of standard bar lengths
| Bars | 6 m (kg) | 12 m (kg) |
|---|---|---|
| 1 | 1.3 | 2.7 |
| 10 | 13.3 | 26.6 |
| 50 | 66.6 | 133.2 |
| 100 | 133.2 | 266.4 |
Bars per tonne
| Bar length | Bars per tonne |
|---|---|
| 6 m | 750.8 |
| 9 m | 500.5 |
| 12 m | 375.4 |
One tonne of 6 mm rebar is 4,505 m per tonne. Use this to turn a weight on a delivery note into a bar count.
How the weight is calculated
Area = π ÷ 4 × 6² = 28.3 mm². Weight per metre = area × 7850 kg/m³ = 28.3 × 10⁻⁶ m² × 7850 = 0.222 kg/m. The d² ÷ 162 rule gives 36 ÷ 162 = 0.222 kg/m.
Deformed bars and TMT bars are sold by nominal diameter and nominal mass; the ribs are already allowed for, and standards accept a small mass tolerance per bar. See the rebar weight formula guide.
6 mm rebar per square metre of slab
Weight of 6 mm rebar in a slab or wall for common spacings, for one layer in one direction and for bars both ways. Add laps, hooks and chairs on top.
| Spacing (centres) | One direction (kg/m²) | Both directions (kg/m²) |
|---|---|---|
| 100 mm | 2.22 | 4.44 |
| 125 mm | 1.78 | 3.55 |
| 150 mm | 1.48 | 2.96 |
| 200 mm | 1.11 | 2.22 |
| 250 mm | 0.89 | 1.78 |
| 300 mm | 0.74 | 1.48 |
Compared with nearby sizes
| Bar | kg/m | lb/ft | vs this bar |
|---|---|---|---|
| 6 mm rebar | 0.222 | 0.149 | — |
| 8 mm rebar | 0.395 | 0.265 | +78 % |
| 10 mm rebar | 0.617 | 0.415 | +178 % |
Bars this small are used mainly for stirrups, ties and links, and for light mesh in thin slabs and walls. The nearest US bar is #3 rebar (9.5 mm, 0.560 kg/m).
Frequently asked questions
What is the weight of 6 mm rebar per metre?
6 mm rebar weighs 0.222 kg/m (0.149 lb/ft). By the rule of thumb d squared over 162: 6 x 6 / 162 = 0.222 kg/m.
How much does a 12 m bar of 6 mm rebar weigh?
2.66 kg (0.222 kg/m × 12 m). A 6 m bar weighs 1.33 kg.
How many 12 m bars of 6 mm rebar are in a tonne?
About 375.4 bars, or 4,505 m per tonne.
What is the US equivalent of 6 mm rebar?
The nearest US bar is #3 rebar (9.5 mm, 0.560 kg/m). Check the steel area in the design before substituting one for the other.
How is the weight of 6 mm rebar calculated?
Area = π ÷ 4 × 6² = 28.3 mm². Weight per metre = area × 7850 kg/m³ = 28.3 × 10⁻⁶ m² × 7850 = 0.222 kg/m. The d² ÷ 162 rule gives 36 ÷ 162 = 0.222 kg/m.
How much 6 mm rebar is needed per square metre at 150 mm spacing?
One layer at 150 mm centres needs 1.48 kg/m² in one direction, 2.96 kg/m² for bars both ways, plus laps.
Other bar sizes
8 mm rebar · 10 mm rebar · 12 mm rebar · 14 mm rebar · 16 mm rebar · 20 mm rebar · 25 mm rebar · 28 mm rebar · 32 mm rebar · 40 mm rebar · 50 mm rebar
Full rebar weight chart · Steel weight calculator
Data adapted from Wikipedia, "Rebar" (CC BY-SA 4.0).