Metal weight

Rebar Ø18 mm weight

Steel Rebar Ø18 weighs 2.00 kg/m. A 6 m bar weighs 12.0 kg and a 12 m bar 24.0 kg. Values are theoretical, for a density of 7.85 g/cm³.

Weight per metre2.00kg/m
6 m bar12.0kg
12 m bar24.0kg
Metres per tonne500.6m
Painting surface0.057m²/m
Ø 18 mm
Nominal diameter
18 mm
Usual bar length
12 m
Section area
2.54 cm²
Metres per tonne
501 m/t
Outer surface
0.057 m²/m

Weight by length

LengthSteelStainless 304Aluminium
1 m2.00 kg2.02 kg0.69 kg
2 m4.00 kg4.04 kg1.37 kg
3 m5.99 kg6.05 kg2.06 kg
4 m7.99 kg8.07 kg2.75 kg
5 m9.99 kg10.09 kg3.44 kg
6 m11.99 kg12.11 kg4.12 kg
8 m15.98 kg16.14 kg5.50 kg
10 m19.98 kg20.18 kg6.87 kg
12 m23.97 kg24.22 kg8.24 kg

How it was calculated

The weight is the section area multiplied by the material density:

kg/m = d² × 0.006165 (0.00617 rounded), where d is the nominal diameter in mm.

For Rebar Ø18, the section area is 2.54 cm², so 1 metre = 2.54 × 0.785 = 1.998 kg.

The real weight can differ by a few percent because of rolling tolerances. For other materials or lengths use the calculator.

Other rebar sizes

Rebar Ø6Rebar Ø8Rebar Ø10Rebar Ø12Rebar Ø14Rebar Ø16Rebar Ø18Rebar Ø20Rebar Ø22Rebar Ø25Rebar Ø28Rebar Ø32Rebar Ø36Rebar Ø40Full table →

Working out a whole order?

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Frequently asked questions

How much does one metre of Rebar Ø18 weigh?

One metre of steel Rebar Ø18 weighs 2.00 kg.

How much does a 6 m bar of Rebar Ø18 weigh?

A 6 m bar weighs 12.0 kg and a 12 m bar 24.0 kg.

How many metres of Rebar Ø18 are in one tonne?

One tonne contains about 500.6 metres.