Foot per second (ft/s) is a unit commonly used to measure velocity, particularly in the United States. It’s fascinating to note that this unit offers a unique perspective on speed, especially when compared to more universal units like meters per second. For instance, the speed of sound travels at approximately 1,125 feet per second, illustrating just how fast sound waves can move. Moreover, this unit is an essential part of the British Imperial and U.S. customary systems, embodying the historical evolution of measurement standards.
Interestingly, foot per second was also a critical measure in ancient construction and engineering, where precision in the rate of stone placement or water flow impacted architectural marvels. Today, it’s frequently applied in sports science to analyze athletic performances, such as a sprinter’s burst off the starting blocks or the flight speed of a baseball pitcher’s throw. This unit continues to bridge past engineering feats with modern technological applications, providing a unique linkage of history and contemporary science.
Millimeter per hour is a unit of speed often used to measure the rate of slow-moving phenomena, such as the growth of glaciers or the flow of sap in trees. Compared to everyday speeds like kilometers per hour, millimeters per hour might seem almost imperceptible, yet this unit is crucial for understanding natural processes that occur over extended periods.
Interestingly, certain glaciers move only a few millimeters per hour, but over weeks, months, and years, this glacial creep dramatically shapes entire landscapes. Meanwhile, indoor humidity control systems can measure evaporation rates in millimeters per hour to optimize environmental conditions. This seemingly minuscule unit underscores the importance of precision in scientific measurements, highlighting the incredible variance in speeds and the vast scales of time and distance we explore.
| Feet per second | Millimeters per hour |
|---|---|
0
ft/s
|
0
mm/h
|
1
ft/s
|
1097279.70739
mm/h
|
2
ft/s
|
2194559.41478
mm/h
|
3
ft/s
|
3291839.12218
mm/h
|
4
ft/s
|
4389118.82957
mm/h
|
5
ft/s
|
5486398.53696
mm/h
|
6
ft/s
|
6583678.24435
mm/h
|
7
ft/s
|
7680957.95174
mm/h
|
8
ft/s
|
8778237.65914
mm/h
|
9
ft/s
|
9875517.36653
mm/h
|
10
ft/s
|
1.09728e+7
mm/h
|
11
ft/s
|
1.20701e+7
mm/h
|
12
ft/s
|
1.31674e+7
mm/h
|
13
ft/s
|
1.42646e+7
mm/h
|
14
ft/s
|
1.53619e+7
mm/h
|
15
ft/s
|
1.64592e+7
mm/h
|
16
ft/s
|
1.75565e+7
mm/h
|
17
ft/s
|
1.86538e+7
mm/h
|
18
ft/s
|
1.9751e+7
mm/h
|
19
ft/s
|
2.08483e+7
mm/h
|
20
ft/s
|
2.19456e+7
mm/h
|
21
ft/s
|
2.30429e+7
mm/h
|
22
ft/s
|
2.41402e+7
mm/h
|
23
ft/s
|
2.52374e+7
mm/h
|
24
ft/s
|
2.63347e+7
mm/h
|
25
ft/s
|
2.7432e+7
mm/h
|
26
ft/s
|
2.85293e+7
mm/h
|
27
ft/s
|
2.96266e+7
mm/h
|
28
ft/s
|
3.07238e+7
mm/h
|
29
ft/s
|
3.18211e+7
mm/h
|
30
ft/s
|
3.29184e+7
mm/h
|
31
ft/s
|
3.40157e+7
mm/h
|
32
ft/s
|
3.5113e+7
mm/h
|
33
ft/s
|
3.62102e+7
mm/h
|
34
ft/s
|
3.73075e+7
mm/h
|
35
ft/s
|
3.84048e+7
mm/h
|
36
ft/s
|
3.95021e+7
mm/h
|
37
ft/s
|
4.05993e+7
mm/h
|
38
ft/s
|
4.16966e+7
mm/h
|
39
ft/s
|
4.27939e+7
mm/h
|
40
ft/s
|
4.38912e+7
mm/h
|
41
ft/s
|
4.49885e+7
mm/h
|
42
ft/s
|
4.60857e+7
mm/h
|
43
ft/s
|
4.7183e+7
mm/h
|
44
ft/s
|
4.82803e+7
mm/h
|
45
ft/s
|
4.93776e+7
mm/h
|
46
ft/s
|
5.04749e+7
mm/h
|
47
ft/s
|
5.15721e+7
mm/h
|
48
ft/s
|
5.26694e+7
mm/h
|
49
ft/s
|
5.37667e+7
mm/h
|
50
ft/s
|
5.4864e+7
mm/h
|
51
ft/s
|
5.59613e+7
mm/h
|
52
ft/s
|
5.70585e+7
mm/h
|
53
ft/s
|
5.81558e+7
mm/h
|
54
ft/s
|
5.92531e+7
mm/h
|
55
ft/s
|
6.03504e+7
mm/h
|
56
ft/s
|
6.14477e+7
mm/h
|
57
ft/s
|
6.25449e+7
mm/h
|
58
ft/s
|
6.36422e+7
mm/h
|
59
ft/s
|
6.47395e+7
mm/h
|
60
ft/s
|
6.58368e+7
mm/h
|
61
ft/s
|
6.69341e+7
mm/h
|
62
ft/s
|
6.80313e+7
mm/h
|
63
ft/s
|
6.91286e+7
mm/h
|
64
ft/s
|
7.02259e+7
mm/h
|
65
ft/s
|
7.13232e+7
mm/h
|
66
ft/s
|
7.24205e+7
mm/h
|
67
ft/s
|
7.35177e+7
mm/h
|
68
ft/s
|
7.4615e+7
mm/h
|
69
ft/s
|
7.57123e+7
mm/h
|
70
ft/s
|
7.68096e+7
mm/h
|
71
ft/s
|
7.79069e+7
mm/h
|
72
ft/s
|
7.90041e+7
mm/h
|
73
ft/s
|
8.01014e+7
mm/h
|
74
ft/s
|
8.11987e+7
mm/h
|
75
ft/s
|
8.2296e+7
mm/h
|
76
ft/s
|
8.33933e+7
mm/h
|
77
ft/s
|
8.44905e+7
mm/h
|
78
ft/s
|
8.55878e+7
mm/h
|
79
ft/s
|
8.66851e+7
mm/h
|
80
ft/s
|
8.77824e+7
mm/h
|
81
ft/s
|
8.88797e+7
mm/h
|
82
ft/s
|
8.99769e+7
mm/h
|
83
ft/s
|
9.10742e+7
mm/h
|
84
ft/s
|
9.21715e+7
mm/h
|
85
ft/s
|
9.32688e+7
mm/h
|
86
ft/s
|
9.43661e+7
mm/h
|
87
ft/s
|
9.54633e+7
mm/h
|
88
ft/s
|
9.65606e+7
mm/h
|
89
ft/s
|
9.76579e+7
mm/h
|
90
ft/s
|
9.87552e+7
mm/h
|
91
ft/s
|
9.98525e+7
mm/h
|
92
ft/s
|
1.0095e+8
mm/h
|
93
ft/s
|
1.02047e+8
mm/h
|
94
ft/s
|
1.03144e+8
mm/h
|
95
ft/s
|
1.04242e+8
mm/h
|
96
ft/s
|
1.05339e+8
mm/h
|
97
ft/s
|
1.06436e+8
mm/h
|
98
ft/s
|
1.07533e+8
mm/h
|
99
ft/s
|
1.08631e+8
mm/h
|
100
ft/s
|
1.09728e+8
mm/h
|
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