Designations, diameters and areas of standard bars

Bar No

Diameter (in)

Area (in^2)

Bar No

Diameter (mm)

Area (mm^2)

#3

0.375

0.11

#10

9.5

71

#4

0.500

0.20

#13

12.7

129

#5

0.625

0.31

#16

15.9

199

#6

0.750

0.44

#19

19.1

284

#7

0.875

0.60

#22

22.2

387

#8

1.000

0.79

#25

25.4

510

#9

1.128

1.00

#29

28.7

645

#10

1.270

1.27

#32

32.3

819

#11

1.410

1.56

#36

35.8

1006

#14

1.693

2.25

#43

43.0

1452

#18

2.257

4.00

#57

57.3

2581