NORTHERN OVERSEAS GROUP LIMITED
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inch-mm Conversion table
1"=25.4mm
inch
0
1
2
3
4
5
6
7
8
9
10
Fraction
Decimal
mm
0
0.000000
0.000
25.400
50.800
76.200
101.600
127.000
152.400
177.800
203.200
228.600
254.000
1/64
0.015625
0.397
25.797
51.197
76.597
101.997
127.397
152.797
178.197
203.597
228.997
254.397
1/32
0.031250
0.794
26.194
51.594
76.994
102.394
127.794
153.194
178.594
203.994
229.394
254.794
3/64
0.046875
1.191
26.591
51.991
77.391
102.791
128.191
153.591
178.991
204.391
229.791
255.191
1/16
0.062500
1.588
26.988
52.388
77.788
103.188
128.588
153.988
179.388
204.788
230.188
255.588
5/64
0.078125
1.984
27.384
52.784
78.184
103.584
128.984
154.384
139.784
205.184
230.584
255.984
3/32
0.093750
2.381
27.781
53.181
78.581
103.981
129.381
154.781
180.181
205.581
230.981
256.381
7/64
0.109375
2.778
28.178
53.578
78.978
104.378
129.788
155.178
180.578
205.978
231.378
256.778
1/8
0.125000
3.175
28.575
53.795
79.375
104.775
130.775
155.575
180.975
206.375
231.375
257.175
9/64
0.140625
3.572
28.972
54.372
79.772
105.772
130.572
155.972
181.372
206.772
232.172
257.572
5/32
0.156250
3.969
29.369
54.769
80.169
105.569
130.969
156.369
181.769
207.169
232.569
257.969
11/64
0.171875
4.366
29.766
55.166
80.566
105.966
130.366
156.766
182.166
207.566
232.966
258.366
3/16
0.187500
4.762
30.162
55.562
80.962
106.362
131.762
157.162
182.562
207.962
233.362
258.762
13/64
0.203125
5.169
30.599
55.969
81.359
106.759
132.159
157.559
182.959
208.359
233.759
259.159
7/32
0.218750
5.556
30.956
56.356
81.756
107.156
132.556
157.956
183.356
208.756
234.156
259.556
15/64
0.234375
5.953
31.353
56.753
82.153
108.553
132.953
158.353
183.753
209.153
234.553
259.953
1/4
0.250000
6.350
31.75
57.150
82.550
107.950
133.350
157.750
184.150
209.550
234.950
260.350
17/64
0.265625
6.747
32.147
57.547
82.947
108.347
133.747
157.147
184.547
209.947
235.347
260.747
9/32
0.281250
7.144
32.544
57.944
83.344
108.744
134.144
159.544
184.944
210.344
235.744
261.144
19/64
0.296875
7.541
32.941
58.341
83.741
109.141
134.541
159.941
185.341
210.741
236.141
261.541
5/16
0.312500
7.938
33.338
58.738
84.138
109.538
134.938
160.338
185.738
211.138
236.538
261.938
23/64
0.328125
8.334
33.734
59.134
84.534
109.934
135.334
160.734
186.134
211.534
236.934
262.334
3/8
0.375000
9.525
34.925
60.325
85.725
111.125
136.525
161.925
187.325
212.725
238.125
263.525
25/64
0.390625
9.922
35.322
60.722
86.122
111.522
136.922
162.322
187.722
213.122
238.522
263.922
13/32
0.406250
10.319
35.719
61.119
86.519
11.919
137.319
162.719
188.119
213.519
238.919
264.319
27/64
0.421875
10.716
36.116
61.516
86.916
112.316
137.716
163.116
188.516
213.913
239.316
264.716
7/16
0.437500
11.112
36.512
61.912
87.312
112.712
138.112
163.512
188.912
214.312
239.712
265.112
29/64
0.453125
11.509
36.909
62.309
87.709
113.709
138.509
163.909
189.706
215.106
240.506
265.906
15/32
0.468750
11.906
37.306
62.706
88.106
113.506
138.906
164.306
189.706
215.106
240.506
265.906
31/64
0.484375
12.303
37.703
63.103
88.503
113.903
139.303
164.703
190.103
215.503
240.903
266.303
1/2
0.500000
12.700
38.100
63.500
88.900
114.300
139.700
165.100
190.500
215.900
241.300
266.700
33/64
0.515625
13.097
38.497
63.897
89.297
114.697
140.097
165.497
190.897
216.297
241.697
267.097
17/32
0.531250
13.494
38.894
64.294
89.694
115.094
140.494
165.894
191.294
216.694
242.094
267.494
35/64
0.546875
13.891
39.291
64.691
90.091
115.491
140.891
166.291
191.691
217.091
242.491
267.891
9/16
0.562500
14.288
39.688
65.088
90.488
115.888
141.288
166.688
192.088
217.488
242.888
268.288
37/64
0.578125
14.684
40.481
65.484
90.884
116.284
141.684
167.084
192.484
217.884
243.284
268.684
19/32
0.593750
15.081
40.481
65.881
91.281
116.881
142.081
167.481
192.881
218.281
243.681
269.081
39/64
0.609375
15.478
40.878
66.278
91.678
117.078
142.478
167.878
193.278
218.678
244.078
269.478
5/8
0.625000
15.875
41.275
66.675
92.075
117.475
142.875
168.275
193.675
219.075
244.475
269.875
41/64
0.640625
16.272
41.672
67.072
92.472
117.872
143.272
168.672
194.072
219.472
244.872
270.272
21/32
0.656250
16.669
42.069
67.469
92.869
118.269
143.669
169.069
194.469
219.869
245.269
270.669
43/64
0.671875
17.066
42.466
67.866
93.266
118.666
144.066
169.466
194.866
220.266
245.666
271.066
11/16
0.687500
17.462
42.862
68.262
93.662
119.062
144.462
169.862
195.262
220.662
246.062
271.462
45/64
0.703125
17.859
43.259
68.659
94.059
119.459
144.859
170.259
195.659
221.059
246.459
271.859
23/32
0.718750
18.256
43.656
69.056
94.456
119.856
145.256
170.656
196.056
221.456
246.856
272.256
47/64
0.734375
18.653
44.053
69.453
94.853
120.253
145.653
171.053
196.453
221.853
247.253
272.653
3/4
0.750000
19.050
44.450
69.850
95.250
120.650
146.050
171.450
196.850
222.250
247.650
273.050
49/64
0.765625
19.447
44.847
70.247
95.647
121.047
146.447
171.847
197.247
222.647
248.047
273.447
25/32
0.781250
19.844
45.244
70.644
96.044
121.444
146.844
172.244
197.644
223.044
248.444
273.844
51/64
0.796875
20.241
45.641
41.041
96.441
121.841
147.241
172.641
198.041
223.441
248.841
274.241
13/16
0.812500
20.638
46.038
71.438
96.838
122.238
147.638
173.038
198.438
223.838
249.238
274.638
53/64
0.828125
21.034
46.434
71.834
97.234
122.634
148.034
173.434
198.834
224.234
249.634
275.034
27/32
0.843750
21.431
46.831
72.231
97.631
123.031
148.431
173.831
199.231
224.631
250.031
275.431
55/64
0.859375
21.828
47.228
72.628
98.028
123.428
148.828
174.228
199.628
225.028
250.428
275.828
7/8
0.875000
22.225
47.625
73.025
98.425
123.825
149.225
174.625
200.025
225.425
250.825
276.225
57/64
0.890625
22.622
48.022
73.422
98.822
124.222
149.622
175.022
200.422
225.822
251.222
276.622
29/32
0.906250
23.019
48.419
73.819
99.219
124.619
150.019
175.419
200.819
226.219
251.619
277.019
59/64
0.921875
23.416
48.816
74.216
99.616
125.016
150.416
175.816
201.216
226.616
252.016
277.416
15/16
0.937500
23.812
49.212
74.612
100.012
124.412
150.812
176.212
201.612
227.012
252.412
277.812
61/64
0.953125
24.209
49.609
75.009
100.409
125.809
151.209
176.609
202.009
227.409
252.809
278.209
31/32
0.968750
24.606
50.006
75.406
100.806
126.206
151.606
177.006
202.406
227.806
253.206
278.606
63/64
0.984375
25.003
50.403
75.803
101.203
126.603
152.003
177.403
202.803
228.203
253.603
279.003
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