Austrailia Standard Bar Diameters

Deformed Bar - Grade 500N

Bar Size	Actual Diameter (mm)	Nominal Diameter (mm)	Area (mm2)	Weight (kg/m)
N10	12	10	79	0.617
N12	14	12	113	0.888
N16	18	16	201	1.578
N20	23	20	314	2.466
N24	28	24	452	3.5513
N28	32	28	616	4.8337
N32	36	32	804	6.313
N36	41	36	1020	7.9903
N40	45	40	1257	9.864

 

Deformed Bar - Grade 500E

Bar Size	Actual Diameter (mm)	Nominal Diameter (mm)	Area (mm2)	Weight (kg/m)
RB12	14	12	113	.888

 

Plain Bar - Grade 250N

Bar Size	Actual Diameter (mm)	Nominal Diameter (mm)	Area (mm2)	Weight (kg/m)
R6	6	6	28.27	.222
R8	8	8	50	0.395
R10	10	10	88	0.617
R12	12	12	113	0.888
R16	16	16	201	1.578
R20	20	20	314	2.466
R24	24	24	452	3.639
R28	28	28	616	4.607
R33	33	33	855	6.882
R36	36	36	2020	7.1254

Source
AS/NZS Standards documentation

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Related Link: SRIA