StructX > Design Tables > Conversion > Metric Equivalents of Fractions
Imperial Equivalents
In a world that is divided in the use of imperial and metric units of measure it can sometimes be required to convert one unit of measure to the other in order to satisfy consistent unit usage. Use the drop down to select a value or alternatively the below table has been provided to help find equivalents of imperial fractions, their equivalent decimal value and the metric mm value.
Imperial Fraction:
1 "
2 "
1/2 "
1 1/2 "
2 1/2 "
3 "
1/4 "
3/4 "
1 1/4 "
1 3/4 "
2 1/4 "
2 3/4 "
1/8 "
3/8 "
5/8 "
7/8 "
1 1/8 "
1 3/8 "
1 5/8 "
1 7/8 "
2 1/8 "
2 3/8 "
2 5/8 "
2 7/8 "
1/16 "
3/16 "
5/16 "
7/16 "
9/16 "
11/16 "
13/16 "
15/16 "
1 1/16 "
1 3/16 "
1 5/16 "
1 7/16 "
1 9/16 "
1 11/16 "
1 13/16 "
1 15/16 "
2 1/16 "
2 3/16 "
2 5/16 "
2 7/16 "
2 9/16 "
2 11/16 "
2 13/16 "
2 15/16 "
1/32 "
5/32 "
7/32 "
9/32 "
13/32 "
15/32 "
17/32 "
19/32 "
21/32 "
23/32 "
25/32 "
3/32 "
27/32 "
29/32 "
31/32 "
1 1/32 "
1 3/32 "
1 5/32 "
11/32 "
1 7/32 "
1 9/32 "
1 11/32 "
1 13/32 "
1 15/32 "
1 17/32 "
1 19/32 "
1 21/32 "
1 23/32 "
1 25/32 "
1 27/32 "
1 29/32 "
1 31/32 "
2 1/32 "
2 3/32 "
2 5/32 "
2 7/32 "
2 9/32 "
2 11/32 "
2 13/32 "
2 15/32 "
2 17/32 "
2 19/32 "
2 21/32 "
2 23/32 "
2 25/32 "
2 27/32 "
2 29/32 "
2 31/32 "
1/64 "
3/64 "
5/64 "
7/64 "
9/64 "
11/64 "
13/64 "
15/64 "
17/64 "
19/64 "
21/64 "
23/64 "
25/64 "
27/64 "
29/64 "
31/64 "
33/64 "
35/64 "
37/64 "
39/64 "
41/64 "
43/64 "
45/64 "
47/64 "
49/64 "
51/64 "
53/64 "
55/64 "
57/64 "
59/64 "
61/64 "
63/64 "
1 1/64 "
1 3/64 "
1 5/64 "
1 7/64 "
1 9/64 "
1 11/64 "
1 13/64 "
1 15/64 "
1 17/64 "
1 19/64 "
1 21/64 "
1 23/64 "
1 25/64 "
1 27/64 "
1 29/64 "
1 31/64 "
1 33/64 "
1 35/64 "
1 37/64 "
1 39/64 "
1 41/64 "
1 43/64 "
1 45/64 "
1 47/64 "
1 49/64 "
1 51/64 "
1 53/64 "
1 55/64 "
1 57/64 "
1 59/64 "
1 61/64 "
1 63/64 "
2 1/64 "
2 3/64 "
2 5/64 "
2 7/64 "
2 9/64 "
2 11/64 "
2 13/64 "
2 15/64 "
2 17/64 "
2 19/64 "
2 21/64 "
2 23/64 "
2 25/64 "
2 27/64 "
2 29/64 "
2 31/64 "
2 33/64 "
2 35/64 "
2 37/64 "
2 39/64 "
2 41/64 "
2 43/64 "
2 45/64 "
2 47/64 "
2 49/64 "
2 51/64 "
2 53/64 "
2 55/64 "
2 57/64 "
2 59/64 "
2 61/64 "
2 63/64 "
Metric Equivalent: 25.4 mm
Metric Decimal:
0.40
0.79
1.19
1.59
1.98
2.38
2.78
3.18
3.57
3.97
4.37
4.76
5.16
5.56
5.95
6.35
6.75
7.14
7.54
7.94
8.33
8.73
9.13
9.53
9.92
10.32
10.72
11.11
11.51
11.91
12.30
12.70
13.10
13.49
13.89
14.29
14.68
15.08
15.48
15.88
16.27
16.67
17.07
17.46
17.86
18.26
18.65
19.05
19.45
19.84
20.24
20.64
21.03
21.43
21.83
22.23
22.62
23.02
23.42
23.81
24.21
24.61
25.0
25.40
25.80
26.19
26.59
26.99
27.38
27.78
28.18
28.58
28.97
29.37
29.77
30.16
30.56
30.96
31.35
31.75
32.15
32.54
32.94
33.34
33.73
34.13
34.53
34.93
35.32
35.72
36.12
36.51
36.91
37.31
37.70
38.10
38.50
38.89
39.29
39.69
40.08
40.48
40.88
41.28
41.67
42.07
42.47
42.86
43.26
43.66
44.05
44.45
44.85
45.24
45.64
46.04
46.43
46.83
47.23
47.63
48.02
48.42
48.82
49.21
49.61
50.01
50.40
50.80
51.20
51.59
51.99
52.39
52.78
53.18
53.58
53.98
54.37
54.77
55.17
55.56
55.96
56.36
56.75
57.15
57.55
57.94
58.34
58.74
59.13
59.53
59.93
60.33
60.72
61.12
61.52
61.91
62.31
62.71
63.10
63.50
63.90
64.29
64.69
65.09
65.48
65.88
66.28
66.68
67.07
67.47
67.87
68.26
68.66
69.06
69.45
69.85
70.25
70.64
71.04
71.44
71.83
72.23
72.63
73.03
73.42
73.82
74.22
74.61
75.01
75.41
75.80
76.20
76.20000
Imperial Equivalent: 1/64 "
Imperial
Metric
Imperial
Metric
Imperial
Metric
fraction
decimal
mm
fraction
decimal
mm
fraction
decimal
mm
1/64 0.0156 0.3969 1 1/64 1.0156 25.7969 2 1/64 2.0156 51.1969
1/32
0.0313
0.7938
1 1/32
1.0313
26.1938
2 1/32
2.0313
51.5938
3/64
0.0469
1.1906
1 3/64
1.0469
26.5906
2 3/64
2.0469
51.9906
1/16
0.0625
1.5875
1 1/16
1.0625
26.9875
2 1/16
2.0625
52.3875
5/64
0.0781
1.9844
1 5/64
1.0781
27.3844
2 5/64
2.0781
52.7844
3/32
0.0938
2.3813
1 3/32
1.0938
27.7813
2 3/32
2.0938
53.1813
7/64
0.1094
2.7781
1 7/64
1.1094
28.1781
2 7/64
2.1094
53.5781
1/8 0.1250 3.1750 1 1/8 1.1250 28.5750 2 1/8 2.1250 53.9750
9/64
0.1406
3.5719
1 9/64
1.1406
28.9719
2 9/64
2.1406
54.3719
5/32
0.1563
3.9688
1 5/32
1.1563
29.3688
2 5/32
2.1563
54.7688
11/64
0.1719
4.3656
1 11/64
1.1719
29.7656
2 11/64
2.1719
55.1656
3/16
0.1875
4.7625
1 3/16
1.1875
30.1625
2 3/16
2.1875
55.5625
13/64
0.2031
5.1594
1 13/64
1.2031
30.5594
2 13/64
2.2031
55.9594
7/32
0.2188
5.5563
1 7/32
1.2188
30.9563
2 7/32
2.2188
56.3563
15/64
0.2344
5.9531
1 15/64
1.2344
31.3531
2 15/64
2.2344
56.7531
1/4 0.2500 6.3500 1 1/4 1.2500 31.7500 2 1/4 2.2500 57.1500
17/64
0.2656
6.7469
1 17/64
1.2656
32.1469
2 17/64
2.2656
57.5469
9/32
0.2813
7.1438
1 9/32
1.2813
32.5438
2 9/32
2.2813
57.9438
19/64
0.2969
7.5406
1 19/64
1.2969
32.9406
2 19/64
2.2969
58.3406
5/16
0.3125
7.9375
1 5/16
1.3125
33.3375
2 5/16
2.3125
58.7375
21/64
0.3281
8.3344
1 21/64
1.3281
33.7344
2 21/64
2.3281
59.1344
11/32
0.3438
8.7313
1 11/32
1.3438
34.1313
2 11/32
2.3438
59.5313
23/64
0.3594
9.1281
1 23/64
1.3594
34.5281
2 23/64
2.3594
59.9281
3/8 0.3750 9.5250 1 3/8 1.3750 34.9250 2 3/8 2.3750 60.3250
25/64
0.3906
9.9219
1 25/64
1.3906
35.3219
2 25/64
2.3906
60.7219
13/32
0.4063
10.3188
1 13/32
1.4063
35.7188
2 13/32
2.4063
61.1188
27/64
0.4219
10.7156
1 27/64
1.4219
36.1156
2 27/64
2.4219
61.5156
7/16
0.4375
11.1125
1 7/16
1.4375
36.5125
2 7/16
2.4375
61.9125
29/64
0.4531
11.5094
1 29/64
1.4531
36.9094
2 29/64
2.4531
62.3094
15/32
0.4688
11.9063
1 15/32
1.4688
37.3063
2 15/32
2.4688
62.7063
31/64
0.4844
12.3031
1 31/64
1.4844
37.7031
2 31/64
2.4844
63.1031
1/2 0.5000 12.7000 1 1/2 1.5000 38.1000 2 1/2 2.5000 63.5000
33/64
0.5156
13.0969
1 33/64
1.5156
38.4969
2 33/64
2.5156
63.8969
17/32
0.5313
13.4938
1 17/32
1.5313
38.8938
2 17/32
2.5313
64.2938
35/64
0.5469
13.8906
1 35/64
1.5469
39.2906
2 35/64
2.5469
64.6906
9/16
0.5625
14.2875
1 9/16
1.5625
39.6875
2 9/16
2.5625
65.0875
37/64
0.5781
14.6844
1 37/64
1.5781
40.0844
2 37/64
2.5781
65.4844
19/32
0.5938
15.0813
1 19/32
1.5938
40.4813
2 19/32
2.5938
65.8813
39/64
0.6094
15.4781
1 39/64
1.6094
40.8781
2 39/64
2.6094
66.2781
5/8 0.6250 15.8750 1 5/8 1.6250 41.2750 2 5/8 2.6250 66.6750
41/64
0.6406
16.2719
1 41/64
1.6406
41.6719
2 41/64
2.6406
67.0719
21/32
0.6563
16.6688
1 21/32
1.6563
42.0688
2 21/32
2.6563
67.4688
43/64
0.6719
17.0656
1 43/64
1.6719
42.4656
2 43/64
2.6719
67.8656
11/16
0.6875
17.4625
1 11/16
1.6875
42.8625
2 11/16
2.6875
68.2625
45/64
0.7031
17.8594
1 45/64
1.7031
43.2594
2 45/64
2.7031
68.6594
23/32
0.7188
18.2563
1 23/32
1.7188
43.6563
2 23/32
2.7188
69.0563
47/64
0.7344
18.6531
1 47/64
1.7344
44.0531
2 47/64
2.7344
69.4531
3/4 0.7500 19.0500 1 3/4 1.7500 44.4500 2 3/4 2.7500 69.8500
49/64
0.7656
19.4469
1 49/64
1.7656
44.8469
2 49/64
2.7656
70.2469
25/32
0.7813
19.8438
1 25/32
1.7813
45.2438
2 25/32
2.7813
70.6438
51/64
0.7969
20.2406
1 51/64
1.7969
45.6406
2 51/64
2.7969
71.0406
13/16
0.8125
20.6375
1 13/16
1.8125
46.0375
2 13/16
2.8125
71.4375
53/64
0.8281
21.0344
1 53/64
1.8281
46.4344
2 53/64
2.8281
71.8344
27/32
0.8438
21.4313
1 27/32
1.8438
46.8313
2 27/32
2.8438
72.2313
55/64
0.8594
21.8281
1 55/64
1.8594
47.2281
2 55/64
2.8594
72.6281
7/8 0.8750 22.2250 1 7/8 1.8750 47.6250 2 7/8 2.8750 73.0250
57/64
0.8906
22.6219
1 57/64
1.8906
48.0219
2 57/64
2.8906
73.4219
29/32
0.9063
23.0188
1 29/32
1.9063
48.4188
2 29/32
2.9063
73.8188
59/64
0.9219
23.4156
1 59/64
1.9219
48.8156
2 59/64
2.9219
74.2156
15/16
0.9375
23.8125
1 15/16
1.9375
49.2125
2 15/16
2.9375
74.6125
61/64
0.9531
24.2094
1 61/64
1.9531
49.6094
2 61/64
2.9531
75.0094
31/32
0.9688
24.6063
1 31/32
1.9688
50.0063
2 31/32
2.9688
75.4063
63/64
0.9844
25.0031
1 63/64
1.9844
50.4031
2 63/64
2.9844
75.8031
1 1.0000 25.4000 2 2.0000 50.8000 3 3.0000 76.2000
