Rebar Size Chart: 8-32 mm Diameters, Weight per Metre and Bars per Tonne

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Rebar size chart for 8 to 32 mm: weight per metre, weight of a 12 m bar, and bars per tonne, with price range and median from Almadah's catalogue, VAT-inclusive (20/10/2026).

Rebar Size Chart: 8-32 mm Diameters, Weight per Metre and Bars per Tonne

Short answer: Rebar weight per metre = diameter squared / 162, in kg. A 12 mm bar weighs about 0.889 kg/m, 16 mm about 1.58 kg/m, and 32 mm about 6.32 kg/m. A 12 m bar of 12 mm weighs about 10.7 kg, so one tonne holds roughly 94 bars.

What is the weight per metre and the number of bars per tonne for each diameter?

The table is theoretical, based on steel density of 7,850 kg/m³ and a 12 m bar, the common length in the reinforcing steel catalogue.

Diameter (mm)	Weight per metre (kg/m)	Weight of 12 m bar (kg)	Bars per tonne
8	0.395	4.7	211
10	0.617	7.4	135
12	0.889	10.7	94
14	1.210	14.5	69
16	1.580	19.0	53
18	2.000	24.0	42
20	2.470	29.6	34
22	2.990	35.9	28
25	3.860	46.3	22
28	4.840	58.1	17
32	6.320	75.9	13

Weights are theoretical (diameter squared / 162). Mills allow a weight tolerance, so on receipt rely on the mill certificate and the actual delivery weighbridge ticket.

How do I calculate the weight of any bar or quantity myself?

Three steps work for every diameter:

Weight per metre = diameter in mm, squared, divided by 162.
Weight of a bar = weight per metre x length in metres.
Bars per tonne = 1,000 / weight of one bar.

Example, a 16 mm bar of 12 m: 16 x 16 / 162 = 1.58 kg/m, x 12 = 19.0 kg, and 1,000 / 19.0 = about 53 bars per tonne. For lengths other than 12 m, change only step 2.

What do "Abu 12" and "Abu 16" mean on a Saudi site?

It is site slang for the bar diameter in mm: Abu 12 is a 12 mm bar, Abu 16 a 16 mm bar, and so on. Commonly, 8, 10, and 12 mm go into stirrups, slabs, and roofs; 14, 16, and 18 mm into beams and columns of residential buildings; and 20 mm and above into heavy columns and foundations. The structural drawings decide the diameter for each element, not this chart.

Which diameters and grades does Almadah's catalogue carry?

Bars in the catalogue are 12 m long to ASTM A615 Grade 60 (nominal yield strength 420 MPa), some in Grade 80, with the most common diameters being 10, 12, 14, 16, 18, 20, 22, 25, and 32 mm. There are also a few listings of cold-drawn Grade 40 bar in smaller diameters (6, 8, and 9.5 mm) at 6 or 12 m; these do not replace A615 bar in structural work unless the engineer approves. Bars come from Saudi and regional mills such as Watania, Al Ittefaq, Al Rajhi, Ajeej, and Al Sadd, and from named brands such as Hadeed, United Sulb, and Tameer Steel.

How much does rebar cost per tonne and per bar?

Price range of rebar listings (VAT-inclusive 15%, as of 20/10/2026):

Lowest: SAR 2,625.00
Median price: SAR 3,230.07
Highest: SAR 4,347.00 (cold-drawn 6 mm x 6 m, Grade 40)

The pattern is that one mill's price is nearly identical across diameters, and the price level (about SAR 3,200) matches tonne-based pricing rather than per-bar pricing, since a 16 mm bar weighs only about 19 kg. Product pages do not state the unit clearly, so confirm it before you calculate. For illustration only: at the median of SAR 3,230.07 per tonne, a 16 mm x 12 m bar would be about SAR 61, but this is a reference calculation, not a price promise; the actual price depends on the mill, the date, and the quantity.

What are the best-selling rebar sizes in practice?

Order history in this category is still small. The top sellers are Watania 16 mm x 12 m, then Ajeej 12 mm x 12 m, then Al Sadd 20 mm x 12 m. This is an early signal from our order log, not a market survey, since many contractor purchases go through direct quotations. For large quantities you can request a quotation.

FAQ

How much does a 12 mm or 16 mm rebar weigh per metre?

A 12 mm bar weighs about 0.889 kg per metre and a 16 mm bar about 1.58 kg per metre, using the theoretical rule: weight in kg per metre = diameter squared / 162.

How many bars are in one tonne of rebar?

At 12 m length: about 94 bars of 12 mm, 53 bars of 16 mm, 34 bars of 20 mm, and 13 bars of 32 mm.

How do I calculate the weight of a rebar?

Multiply the diameter in mm squared by the length in metres, then divide by 162. Example: a 16 mm bar of 12 m = 16 x 16 x 12 / 162 = about 19.0 kg.

What do site crews mean by "Abu 12" and "Abu 16"?

It is colloquial Saudi site talk for the bar diameter in mm: Abu 12 is a 12 mm bar and Abu 16 is a 16 mm bar.

How much does rebar cost in Saudi Arabia?

As of 20/10/2026, VAT-inclusive (15%): SAR 2,625.00 to 4,347.00, with a median of SAR 3,230.07 across the rebar listings in the catalogue. Check the unit of sale on the product page.

Does the actual weight match the theoretical weight?

It comes close, but mills allow a weight tolerance, so rely on the mill certificate and the actual delivery weighbridge ticket on receipt.