Gauge

Inches

Millimeters

0000

.460

11.684

000

.410

10.404

00

.365

9.266

0

.325

8.26

2

.257

6.54

4

.204

5.19

6

.162

4.12

8

.128

3.26

10

.102

2.59

12

.081

2.05

14

.064

1.63

16

.051

1.29

18

.040

1.02

20

.032

.812

Inches

Decimal inches

Millimeters

1/8

.125

3.2

3/16

.1875

4.8

1/4

.250

6.4

5/16

.3125

7.94

3/8

.375

9.5

7/16

.4375

11.11

1/2

.500

12.7

9/16

.5625

14.29

5/8

.625

15.9

11/16

.6875

17.46

3/4

.750

19.0

13/16

.8125

20.64

7/8

.875

22.2

15/16

.9375

23.81

1

1.000

25.4