The inch, once the size of a barleycorn kernel, has fascinating origins. Early English measurement systems based it on the width of a man’s thumb. In the 14th century, King Edward II of England formalized it, defining an inch as the length of three barleycorns laid end to end. Historically, the inch was crucial for countless innovations, especially in Anglo-Saxon countries, influencing everything from watchmaking to industrial design.
Today, the inch still plays an integral role in areas like screen sizes and standardized paper dimensions, delighting both tech enthusiasts and everyday users. Interestingly, in surveying, an inch is divided into hundredths in the US, showing its adaptability in precision tasks. Despite the global shift towards the metric system, the inch endures, showcasing its resilience and continued relevance.
The nautical mile, a critical unit used in maritime and air navigation, is distinct from the standard mile in its basis on the Earth’s geometry. Defined as exactly 1,852 meters, it represents one minute of latitude. This unit’s origin is deeply linked to the elliptical shape of our planet, making it remarkably convenient for charting a course along the Earth’s curved surface. Interestingly, its historical adoption can be traced back to the early 20th century, when international standardization made it the universal measure for maritime and aviation purposes.
This unit is associated with speed measurements at sea and in the air, such as knots. A knot, which equals one nautical mile per hour, emphasizes the unit’s prevalence in global navigation. Understanding the nautical mile’s unique correlation with Earth’s circumference and its importance in navigation can deepen one’s appreciation of geographic exploration and cartography.
| Inches | Nautical Miles |
|---|---|
0
in
|
0
nMi
|
1
in
|
1.37149e-5
nMi
|
2
in
|
2.74298e-5
nMi
|
3
in
|
4.11447e-5
nMi
|
4
in
|
5.48596e-5
nMi
|
5
in
|
6.85745e-5
nMi
|
6
in
|
8.22894e-5
nMi
|
7
in
|
9.60042e-5
nMi
|
8
in
|
0.000109719
nMi
|
9
in
|
0.000123434
nMi
|
10
in
|
0.000137149
nMi
|
11
in
|
0.000150864
nMi
|
12
in
|
0.000164579
nMi
|
13
in
|
0.000178294
nMi
|
14
in
|
0.000192008
nMi
|
15
in
|
0.000205723
nMi
|
16
in
|
0.000219438
nMi
|
17
in
|
0.000233153
nMi
|
18
in
|
0.000246868
nMi
|
19
in
|
0.000260583
nMi
|
20
in
|
0.000274298
nMi
|
21
in
|
0.000288013
nMi
|
22
in
|
0.000301728
nMi
|
23
in
|
0.000315443
nMi
|
24
in
|
0.000329157
nMi
|
25
in
|
0.000342872
nMi
|
26
in
|
0.000356587
nMi
|
27
in
|
0.000370302
nMi
|
28
in
|
0.000384017
nMi
|
29
in
|
0.000397732
nMi
|
30
in
|
0.000411447
nMi
|
31
in
|
0.000425162
nMi
|
32
in
|
0.000438877
nMi
|
33
in
|
0.000452591
nMi
|
34
in
|
0.000466306
nMi
|
35
in
|
0.000480021
nMi
|
36
in
|
0.000493736
nMi
|
37
in
|
0.000507451
nMi
|
38
in
|
0.000521166
nMi
|
39
in
|
0.000534881
nMi
|
40
in
|
0.000548596
nMi
|
41
in
|
0.000562311
nMi
|
42
in
|
0.000576025
nMi
|
43
in
|
0.00058974
nMi
|
44
in
|
0.000603455
nMi
|
45
in
|
0.00061717
nMi
|
46
in
|
0.000630885
nMi
|
47
in
|
0.0006446
nMi
|
48
in
|
0.000658315
nMi
|
49
in
|
0.00067203
nMi
|
50
in
|
0.000685745
nMi
|
51
in
|
0.00069946
nMi
|
52
in
|
0.000713174
nMi
|
53
in
|
0.000726889
nMi
|
54
in
|
0.000740604
nMi
|
55
in
|
0.000754319
nMi
|
56
in
|
0.000768034
nMi
|
57
in
|
0.000781749
nMi
|
58
in
|
0.000795464
nMi
|
59
in
|
0.000809179
nMi
|
60
in
|
0.000822894
nMi
|
61
in
|
0.000836608
nMi
|
62
in
|
0.000850323
nMi
|
63
in
|
0.000864038
nMi
|
64
in
|
0.000877753
nMi
|
65
in
|
0.000891468
nMi
|
66
in
|
0.000905183
nMi
|
67
in
|
0.000918898
nMi
|
68
in
|
0.000932613
nMi
|
69
in
|
0.000946328
nMi
|
70
in
|
0.000960042
nMi
|
71
in
|
0.000973757
nMi
|
72
in
|
0.000987472
nMi
|
73
in
|
0.00100119
nMi
|
74
in
|
0.0010149
nMi
|
75
in
|
0.00102862
nMi
|
76
in
|
0.00104233
nMi
|
77
in
|
0.00105605
nMi
|
78
in
|
0.00106976
nMi
|
79
in
|
0.00108348
nMi
|
80
in
|
0.00109719
nMi
|
81
in
|
0.00111091
nMi
|
82
in
|
0.00112462
nMi
|
83
in
|
0.00113834
nMi
|
84
in
|
0.00115205
nMi
|
85
in
|
0.00116577
nMi
|
86
in
|
0.00117948
nMi
|
87
in
|
0.0011932
nMi
|
88
in
|
0.00120691
nMi
|
89
in
|
0.00122063
nMi
|
90
in
|
0.00123434
nMi
|
91
in
|
0.00124806
nMi
|
92
in
|
0.00126177
nMi
|
93
in
|
0.00127549
nMi
|
94
in
|
0.0012892
nMi
|
95
in
|
0.00130291
nMi
|
96
in
|
0.00131663
nMi
|
97
in
|
0.00133034
nMi
|
98
in
|
0.00134406
nMi
|
99
in
|
0.00135777
nMi
|
100
in
|
0.00137149
nMi
|
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