Bar Diameters

U.S. Standard Diameters with Imperial Specifications

			Nominal Dimensions
Bar Size Imperial	Bar Size Soft Metric	Actual Diameter (in)	Nominal Diameter (in)	Area (in2)	Weight (lb/ft)
#3	10mm	0.4375	0.3750	0.11	0.376
#4	13mm	0.5625	0.5000	0.20	0.668
#5	16mm	0.6875	0.6250	0.31	1.043
#6	19mm	0.8750	0.7500	0.44	1.502
#7	22mm	1.0000	.08750	0.60	2.044
#8	25mm	1.1250	1.000	0.79	2.670
#9	29mm	1.2500	1.1280	1.00	3.400
#10	32mm	1.4375	1.2700	1.27	4.303
#11	36mm	1.6250	1.4100	1.56	5.313
#14	43mm	1.8750	1.6930	2.25	7.650
#18	57mm	2.5000	2.2570	4.00	13.600

U.S. "Soft Metric" Diameters with Metric Specifications

			Nominal Dimensions
Bar Size Soft Metric	Bar Size Imperial	Actual Diameter (mm)	Nominal Diameter (mm)	Area (mm2)	Weight (kg/m)
10mm	#3	11.10	9.525	71	.5610
13mm	#4	14.30	12.700	129	.996
16mm	#5	17.50	15.875	200	1.556
19mm	#6	22.20	19.050	284	2.24
22mm	#7	25.40	22.225	387	3.049
25mm	#8	28.60	25.400	509	3.982
29mm	#9	31.80	28.650	645	5.071
32mm	#10	36.50	32.260	819	6.418
36mm	#11	41.30	35.810	1006	7.924
43mm	#14	47.60	43.000	1452	11.41
57mm	#18	63.50	57.330	2581	20.284