Weight per metre9.86kg/m
6 m bar59.2kg
12 m bar118.4kg
Metres per tonne101.4m
Painting surface0.126m²/m
- Diameter
- 40 mm
- Section area
- 12.57 cm²
- Outer surface
- 0.126 m²/m
- Outer surface
- 0.126 m²/m
Weight by length
| Length | Steel | Stainless 304 | Aluminium |
|---|---|---|---|
| 1 m | 9.86 kg | 9.97 kg | 3.39 kg |
| 2 m | 19.73 kg | 19.93 kg | 6.79 kg |
| 3 m | 29.59 kg | 29.90 kg | 10.18 kg |
| 4 m | 39.46 kg | 39.86 kg | 13.57 kg |
| 5 m | 49.32 kg | 49.83 kg | 16.96 kg |
| 6 m | 59.19 kg | 59.79 kg | 20.36 kg |
| 8 m | 78.92 kg | 79.72 kg | 27.14 kg |
| 10 m | 98.65 kg | 99.65 kg | 33.93 kg |
| 12 m | 118.38 kg | 119.58 kg | 40.72 kg |
How it was calculated
The weight is the section area multiplied by the material density:
kg/m = d² × 0.006165, where d is the diameter in mm.For Round bar Ø40, the section area is 12.57 cm², so 1 metre = 12.57 × 0.785 = 9.865 kg.
The real weight can differ by a few percent because of rolling tolerances. For other materials or lengths use the calculator.
Other round bar sizes
Round bar Ø18Round bar Ø20Round bar Ø22Round bar Ø25Round bar Ø28Round bar Ø30Round bar Ø32Round bar Ø35Round bar Ø40Round bar Ø45Round bar Ø50Round bar Ø55Round bar Ø60Round bar Ø65Round bar Ø70Round bar Ø75Round bar Ø80Full table →
Working out a whole order?
Add Round bar Ø40 to the materials list and see the total weight and cost of the order, together with the other products.
Frequently asked questions
How much does one metre of Round bar Ø40 weigh?
One metre of steel Round bar Ø40 weighs 9.86 kg.
How much does a 6 m bar of Round bar Ø40 weigh?
A 6 m bar weighs 59.2 kg and a 12 m bar 118.4 kg.
How many metres of Round bar Ø40 are in one tonne?
One tonne contains about 101.4 metres.