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 kilometer, a unit of length in the metric system, is standard for measuring distances in most of the world, but did you know that it was officially defined in terms of the Earth’s geometry? Originally, a kilometer was devised as one ten-millionth of the distance from the Equator to the North Pole, a fraction of the Earth’s meridian. This fascinating origin reflects humanity’s quest to make sense of the vastness of our planet.
Moreover, the metric system’s global reign didn’t happen overnight. The U.S. is one of the few countries primarily using miles, yet if you’re ever curious, consider that a marathon—26.2 miles—is approximately 42.195 kilometers! Imagine, the very races where athletes push the limits of human endurance are framed by this historical unit, rooting the challenge in a nearly ten-thousand-year-old tradition.
| US Survey Feet | Kilometers |
|---|---|
0
ft-us
|
0
km
|
1
ft-us
|
0.000304801
km
|
2
ft-us
|
0.000609601
km
|
3
ft-us
|
0.000914402
km
|
4
ft-us
|
0.0012192
km
|
5
ft-us
|
0.001524
km
|
6
ft-us
|
0.0018288
km
|
7
ft-us
|
0.0021336
km
|
8
ft-us
|
0.0024384
km
|
9
ft-us
|
0.00274321
km
|
10
ft-us
|
0.00304801
km
|
11
ft-us
|
0.00335281
km
|
12
ft-us
|
0.00365761
km
|
13
ft-us
|
0.00396241
km
|
14
ft-us
|
0.00426721
km
|
15
ft-us
|
0.00457201
km
|
16
ft-us
|
0.00487681
km
|
17
ft-us
|
0.00518161
km
|
18
ft-us
|
0.00548641
km
|
19
ft-us
|
0.00579121
km
|
20
ft-us
|
0.00609601
km
|
21
ft-us
|
0.00640081
km
|
22
ft-us
|
0.00670561
km
|
23
ft-us
|
0.00701041
km
|
24
ft-us
|
0.00731521
km
|
25
ft-us
|
0.00762001
km
|
26
ft-us
|
0.00792482
km
|
27
ft-us
|
0.00822962
km
|
28
ft-us
|
0.00853442
km
|
29
ft-us
|
0.00883922
km
|
30
ft-us
|
0.00914402
km
|
31
ft-us
|
0.00944882
km
|
32
ft-us
|
0.00975362
km
|
33
ft-us
|
0.0100584
km
|
34
ft-us
|
0.0103632
km
|
35
ft-us
|
0.010668
km
|
36
ft-us
|
0.0109728
km
|
37
ft-us
|
0.0112776
km
|
38
ft-us
|
0.0115824
km
|
39
ft-us
|
0.0118872
km
|
40
ft-us
|
0.012192
km
|
41
ft-us
|
0.0124968
km
|
42
ft-us
|
0.0128016
km
|
43
ft-us
|
0.0131064
km
|
44
ft-us
|
0.0134112
km
|
45
ft-us
|
0.013716
km
|
46
ft-us
|
0.0140208
km
|
47
ft-us
|
0.0143256
km
|
48
ft-us
|
0.0146304
km
|
49
ft-us
|
0.0149352
km
|
50
ft-us
|
0.01524
km
|
51
ft-us
|
0.0155448
km
|
52
ft-us
|
0.0158496
km
|
53
ft-us
|
0.0161544
km
|
54
ft-us
|
0.0164592
km
|
55
ft-us
|
0.016764
km
|
56
ft-us
|
0.0170688
km
|
57
ft-us
|
0.0173736
km
|
58
ft-us
|
0.0176784
km
|
59
ft-us
|
0.0179832
km
|
60
ft-us
|
0.018288
km
|
61
ft-us
|
0.0185928
km
|
62
ft-us
|
0.0188976
km
|
63
ft-us
|
0.0192024
km
|
64
ft-us
|
0.0195072
km
|
65
ft-us
|
0.019812
km
|
66
ft-us
|
0.0201168
km
|
67
ft-us
|
0.0204216
km
|
68
ft-us
|
0.0207264
km
|
69
ft-us
|
0.0210312
km
|
70
ft-us
|
0.021336
km
|
71
ft-us
|
0.0216408
km
|
72
ft-us
|
0.0219456
km
|
73
ft-us
|
0.0222504
km
|
74
ft-us
|
0.0225552
km
|
75
ft-us
|
0.02286
km
|
76
ft-us
|
0.0231648
km
|
77
ft-us
|
0.0234696
km
|
78
ft-us
|
0.0237744
km
|
79
ft-us
|
0.0240792
km
|
80
ft-us
|
0.024384
km
|
81
ft-us
|
0.0246888
km
|
82
ft-us
|
0.0249936
km
|
83
ft-us
|
0.0252984
km
|
84
ft-us
|
0.0256033
km
|
85
ft-us
|
0.0259081
km
|
86
ft-us
|
0.0262129
km
|
87
ft-us
|
0.0265177
km
|
88
ft-us
|
0.0268225
km
|
89
ft-us
|
0.0271273
km
|
90
ft-us
|
0.0274321
km
|
91
ft-us
|
0.0277369
km
|
92
ft-us
|
0.0280417
km
|
93
ft-us
|
0.0283465
km
|
94
ft-us
|
0.0286513
km
|
95
ft-us
|
0.0289561
km
|
96
ft-us
|
0.0292609
km
|
97
ft-us
|
0.0295657
km
|
98
ft-us
|
0.0298705
km
|
99
ft-us
|
0.0301753
km
|
100
ft-us
|
0.0304801
km
|
If you like the website, share it on social media.