The US Survey Foot might seem like an unassuming unit, but it’s steeped in the very history of American land measurement. Unlike the International Foot, which is precisely defined as 0.3048 meters, the US Survey Foot is ever-so-slightly longer at approximately 0.3048006 meters. This minuscule difference stems from surveying practices established in the early 19th century and has historically been used for mapping and property delineation across the United States. Integral to the country’s westward expansion, the US Survey Foot played a pivotal role in the division and sale of public lands—underscoring its foundational impact on both real estate and infrastructure.
Despite its historical significance, the US Survey Foot was officially deprecated at the end of 2022, as the US moves towards a unified use of the International Foot for federal geodetic surveys. This transition simplifies engineering and scientific calculations, streamlining US standards with global practices. The legacy of the US Survey Foot, however, serves as a fascinating footnote in the story of American land development, marking an era when precise measurements charted the course of a growing nation.
The mil is a unit of measurement commonly used in various fields, including manufacturing and meteorology. Originating from the Latin word “millesimum,” meaning “thousandth,” a mil represents one-thousandth of an inch (0.001 inches). Its precision makes it indispensable for industries where exact measurements are crucial, such as printing and engineering. In the world of meteorology, mils are used to measure precipitation, helping to forecast weather conditions accurately.
Interestingly, the term “mil” is also often used interchangeably with “thou,” especially in the machining and engineering sectors. This small yet significant unit plays a vital role in ensuring quality control and standardization across different industries, highlighting its essential presence in our everyday life and technological advancements.
| US Survey Feet | Mils |
|---|---|
0
ft-us
|
0
mil
|
1
ft-us
|
12000.024
mil
|
2
ft-us
|
24000.048
mil
|
3
ft-us
|
36000.072
mil
|
4
ft-us
|
48000.096
mil
|
5
ft-us
|
60000.12
mil
|
6
ft-us
|
72000.144
mil
|
7
ft-us
|
84000.168
mil
|
8
ft-us
|
96000.192
mil
|
9
ft-us
|
108000.216
mil
|
10
ft-us
|
120000.24
mil
|
11
ft-us
|
132000.264
mil
|
12
ft-us
|
144000.288
mil
|
13
ft-us
|
156000.312
mil
|
14
ft-us
|
168000.336
mil
|
15
ft-us
|
180000.36
mil
|
16
ft-us
|
192000.384
mil
|
17
ft-us
|
204000.408
mil
|
18
ft-us
|
216000.432
mil
|
19
ft-us
|
228000.456
mil
|
20
ft-us
|
240000.48
mil
|
21
ft-us
|
252000.504
mil
|
22
ft-us
|
264000.528
mil
|
23
ft-us
|
276000.552
mil
|
24
ft-us
|
288000.576
mil
|
25
ft-us
|
300000.6
mil
|
26
ft-us
|
312000.624
mil
|
27
ft-us
|
324000.648
mil
|
28
ft-us
|
336000.672
mil
|
29
ft-us
|
348000.696
mil
|
30
ft-us
|
360000.72
mil
|
31
ft-us
|
372000.744
mil
|
32
ft-us
|
384000.768
mil
|
33
ft-us
|
396000.792
mil
|
34
ft-us
|
408000.816
mil
|
35
ft-us
|
420000.84
mil
|
36
ft-us
|
432000.864
mil
|
37
ft-us
|
444000.888
mil
|
38
ft-us
|
456000.912
mil
|
39
ft-us
|
468000.936
mil
|
40
ft-us
|
480000.96
mil
|
41
ft-us
|
492000.984
mil
|
42
ft-us
|
504001.008
mil
|
43
ft-us
|
516001.032
mil
|
44
ft-us
|
528001.056
mil
|
45
ft-us
|
540001.08
mil
|
46
ft-us
|
552001.104
mil
|
47
ft-us
|
564001.128
mil
|
48
ft-us
|
576001.152
mil
|
49
ft-us
|
588001.176
mil
|
50
ft-us
|
600001.2
mil
|
51
ft-us
|
612001.224
mil
|
52
ft-us
|
624001.248
mil
|
53
ft-us
|
636001.272
mil
|
54
ft-us
|
648001.296
mil
|
55
ft-us
|
660001.32
mil
|
56
ft-us
|
672001.344
mil
|
57
ft-us
|
684001.368
mil
|
58
ft-us
|
696001.392
mil
|
59
ft-us
|
708001.416
mil
|
60
ft-us
|
720001.44
mil
|
61
ft-us
|
732001.464
mil
|
62
ft-us
|
744001.488
mil
|
63
ft-us
|
756001.512
mil
|
64
ft-us
|
768001.536
mil
|
65
ft-us
|
780001.56
mil
|
66
ft-us
|
792001.584
mil
|
67
ft-us
|
804001.608
mil
|
68
ft-us
|
816001.632
mil
|
69
ft-us
|
828001.656
mil
|
70
ft-us
|
840001.68
mil
|
71
ft-us
|
852001.704
mil
|
72
ft-us
|
864001.728
mil
|
73
ft-us
|
876001.752
mil
|
74
ft-us
|
888001.776
mil
|
75
ft-us
|
900001.8
mil
|
76
ft-us
|
912001.824
mil
|
77
ft-us
|
924001.848
mil
|
78
ft-us
|
936001.872
mil
|
79
ft-us
|
948001.896
mil
|
80
ft-us
|
960001.92
mil
|
81
ft-us
|
972001.944
mil
|
82
ft-us
|
984001.968
mil
|
83
ft-us
|
996001.992
mil
|
84
ft-us
|
1008002.016
mil
|
85
ft-us
|
1020002.04
mil
|
86
ft-us
|
1032002.064
mil
|
87
ft-us
|
1044002.088
mil
|
88
ft-us
|
1056002.112
mil
|
89
ft-us
|
1068002.136
mil
|
90
ft-us
|
1080002.16
mil
|
91
ft-us
|
1092002.184
mil
|
92
ft-us
|
1104002.208
mil
|
93
ft-us
|
1116002.232
mil
|
94
ft-us
|
1128002.256
mil
|
95
ft-us
|
1140002.28
mil
|
96
ft-us
|
1152002.304
mil
|
97
ft-us
|
1164002.328
mil
|
98
ft-us
|
1176002.352
mil
|
99
ft-us
|
1188002.376
mil
|
100
ft-us
|
1200002.4
mil
|
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