Rebar specific weight: weight per linear meter

When purchasing, transporting and calculating reinforced-concrete structures, it is often necessary to know the approximate weight of rebar. The basic calculation is simple: multiply the length of the bars by the mass of one running meter for the selected diameter. The table below helps quickly estimate rebar weight per meter and the number of meters in one tonne.

Detailed table of the weight of 1 meter of rebar

Weight of 5 mm rebar ~ 0.186 kg/m

Weight of 6 mm rebar ~ 0.222 kg/m

Weight of 8 mm rebar ~ 0.395 kg/m

Weight of 10 mm rebar ~ 0.617 kg/m

Weight of 12 mm rebar ~ 0.888 kg/m

Weight of 14 mm rebar ~ 1.210 kg/m

Weight of 16 mm rebar ~ 1.580 kg/m

Weight of 18 mm rebar ~ 2.000 kg/m

Weight of 20 mm rebar ~ 2.470 kg/m

Weight of 22 mm rebar ~ 2.980 kg/m

Weight of 25 mm rebar ~ 3.850 kg/m

Weight of 28 mm rebar ~ 4.830 kg/m

Weight of 32 mm rebar ~ 6.310 kg/m

Weight of 36 mm rebar ~ 7.990 kg/m

Weight of 40 mm rebar ~ 9.870 kg/m

Weight of 45 mm rebar ~ 12.480 kg/m

Weight of 50 mm rebar ~ 15.410 kg/m

Example of calculating linear meter rebar weight

The formula for calculating the number of meters of rebar in 1 tonne is also very simple. It is enough to divide 1 t, or 1000 kg, by the weight of 1 meter of rebar. Below are several examples of calculating the number of meters in 1 tonne of rebar.

1000 kg / 0.222 kg/m = 4504 m in one tonne of 6 mm diameter rebar. In the same way, you can determine the number of meters in one tonne of rebar for any other diameter.

The article gives theoretical mass values for plain or deformed rebar by nominal diameter. Actual batch weight may differ slightly because of diameter tolerances, rib profile, steel class and supply standard. For accurate calculations, request the certificate, data sheet or specification from the seller.

Knowing reference values allows you to estimate batch weight in advance, check the supplier invoice and calculate transport load.

The table values agree with the classical mass formula for a round steel bar at steel density of about 7850 kg/m³. For deliveries, use the current standard, rebar class and manufacturer documents.