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Gauge conversions
Length conversions
3/4":
19mm
8g:
3.2mm
1/4":
6mm
7/8":
22mm
5/8":
16mm
10g:
2.5mm
5/16":
8mm
1":
25mm
1/2":
12mm
12g:
2mm
3/8":
10mm
1 1/4":
32mm
00g:
9.2mm
14g:
1.6mm
7/16":
11mm
1 3/8":
35mm
0g:
8mm
16g:
1.2mm
1/2":
12mm
1 1/2":
38mm
2g:
6.5mm
18g:
1mm
9/16":
14mm
1 5/8":
42mm
4g:
5mm
20g:
0.8mm
5/8":
16mm
1 3/4":
45mm
6g:
4mm
22g:
0.6mm
3/4":
19mm
1 7/8":
48mm
US - Canada
Dia. inch
Dia. mm
European
British
French
German
Japanese
Swiss
Australian
Italian
0000
0.39
9.91
-
00
0.422
10.72
-
0
0.454
11.53
-
1/2
0.474
11.95
A
3/4
0.482
12.18
A 1/2
1
0.487
12.37
38.9
B
1
1 1/4
-
12.6
39.6
B 1/2
1 1/2
0.503
12.78
40.2
C
1 3/4
-
13
40.8
C 1/2
2
0.52
13.21
41.5
D
41 1/2
13 1/2
2
1 1/2
2 1/4
-
13.41
42.1
D 1/2
-
-
2 1/2
0.536
13.61
42.7
E
42 3/4
13 3/4
3
2 3/4
2 3/4
-
13.83
43.4
E 1/2
-
-
3
0.553
14.05
44
F
44
14
4
4
3 1/8
-
14.15
44.3
F 1/2
-
-
3 1/4
-
14.25
44.6
-
-
-
3 3/8
-
14.36
44.9
G
45 1/4
-
5
5 1/4
3 1/2
0.569
14.45
45.2
-
-
14 1/2
3 5/8
-
14.56
45.6
G 1/2
-
6
3 3/4
-
14.65
45.9
H
46 1/2
6 1/2
4
0.585
14.86
46.5
H 1/2
-
15
7
4 1/4
-
15.04
47.1
I
47 3/4
7 3/4
4 1/2
0.601
15.27
47.8
I 1/2
-
15 1/4
8
I 1/2
8
4 5/8
-
15.4
48.1
J
49
15 1/2
9
J 1/2
9.5
4 3/4
-
15.53
48.4
-
-
L
10.5
5
0.618
15.7
49
J 1/2
-
15 3/4
9
M
11.5
5 1/8
-
15.8
49.3
K
50
10
N
13
5 1/4
-
15.9
49.6
-
-
O
14.5
5 3/8
-
16
50
K 1/2
-
10
P
16
5 1/2
0.634
16.1
50.3
L
51 3/4
16
11 3/4
Q
17
5 3/4
-
16.3
50.9
-
-
Q 1/2
18.5
5 7/8
-
16.41
51.3
L 1/2
-
R 1/2
19.5
6
0.65
16.51
51.5
M
52 3/4
16 1/2
12
12 3/4
S 1/2
21
6 1/4
-
16.71
52.2
M 1/2
-
T 1/2
22
6 1/2
0.666
16.92
52.8
N
54
17
13
14
U 1/2
23.5
6 3/4
-
17.13
53.4
N 1/2
-
V 1/2
25
7
0.683
17.35
54
O
55 1/4
17 1/4
14
15 1/4
W 1/2
26.5
7 1/4
-
17.45
54.7
O 1/2
-
Y
27.5
7 1/2
0.699
17.75
55.3
P
56 1/2
17 3/4
15
16 1/2
Z
28.5
7 3/4
-
17.97
55.9
P 1/2
-
--
30
8
0.716
18.19
56.6
Q
57 3/4
18
16
17 3/4
I 1/2
8
8 1/4
-
18.35
57.2
Q 1/2
-
J 1/2
9.5
8 1/2
0.732
18.53
57.8
-
-
18 1/2
17
L
10.5
8 5/8
-
18.61
58.4
R
59
19
M
11.5
8 3/4
-
18.69
58.4
-
-
N
13
8 7/8
-
18.8
59
R 1/2
-
O
14.5
9
0.748
18.89
59.1
-
-
19
18
P
16
9 1/8
-
19.1
59.4
S
60 1/4
20 1/4
Q
17
9 1/4
-
19.22
59.7
-
-
Q 1/2
18.5
9 3/8
-
19.31
60
S 1/2
-
R 1/2
19.5
9 1/2
0.764
19.41
60.3
-
-
19 1/2
19
S 1/2
21
9 5/8
-
19.51
60.6
T
61 1/2
21 1/2
T 1/2
22
9 3/4
-
19.62
60.9
-
-
U 1/2
23.5
10
0.781
19.84
61.6
T 1/2
-
20
20
V 1/2
25
10 1/4
-
20.02
62.2
U
62 3/4
21
22 3/4
W 1/2
26.5
10 1/2
0.797
20.2
62.8
U 1/2
-
20 1/4
22
Y
27.5
10 5/8
-
20.32
63.1
V
63
23 3/4
Z
28.5
10 3/4
-
20.44
63.5
-
-
--
30
11
0.814
20.68
64.1
V 1/2
-
20 3/4
23
I 1/2
8
11 1/8
-
20.76
64.3
W
65
25
J 1/2
9.5
11 1/4
-
20.85
64.7
-
-
L
10.5
11 3/8
-
20.94
65
W 1/2
-
M
11.5
11 1/2
-
21.08
65.3
-
-
21
24
N
13
11 5/8
0.83
21.18
65.7
X
66 1/4
26 1/4
O
14.5
11 3/4
-
21.24
66
-
-
P
16
11 7/8
-
21.3
66.3
X 1/2
-
Q
17
12
0.846
21.49
66.6
Y
67 1/2
21 1/4
25
27 1/2
Q 1/2
18.5
12 1/4
-
21.69
67.2
Y 1/2
-
R 1/2
19.5
12 1/2
0.862
21.89
67.9
Z
68 3/4
21 3/4
26
28 3/4
S 1/2
21
12 3/4
-
22.1
68.5
Z 1/2
-
T 1/2
22
13
0.879
22.33
69.1
-
-
22
27
U 1/2
23.5
