Metres per second (m/s) may seem inconspicuous, but it plays a critical role in understanding speed and velocity in scientific contexts. The unit underpins numerous fundamental concepts in physics and engineering, such as calculating the speed of sound at approximately 343 m/s in air at room temperature. This speed metric is also central to space exploration, where spacecraft velocity is often measured in meters per second to ensure precision in navigation and successful missions.
Beyond Earth, Jupiter’s moon, Io, erupts volcanic plumes that reach speeds of over 1,000 m/s, showcasing this unit’s application in celestial phenomena. Transitioning to daily life, elite athletes can clock speeds around 10 m/s during sprints, a testament to human capability. By providing a consistent metric, meters per second serves as a universal bridge across varied disciplines and contexts.
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.
| Metres per second | Millimeters per hour |
|---|---|
0
m/s
|
0
mm/h
|
1
m/s
|
3600000
mm/h
|
2
m/s
|
7200000
mm/h
|
3
m/s
|
1.08e+7
mm/h
|
4
m/s
|
1.44e+7
mm/h
|
5
m/s
|
1.8e+7
mm/h
|
6
m/s
|
2.16e+7
mm/h
|
7
m/s
|
2.52e+7
mm/h
|
8
m/s
|
2.88e+7
mm/h
|
9
m/s
|
3.24e+7
mm/h
|
10
m/s
|
3.6e+7
mm/h
|
11
m/s
|
3.96e+7
mm/h
|
12
m/s
|
4.32e+7
mm/h
|
13
m/s
|
4.68e+7
mm/h
|
14
m/s
|
5.04e+7
mm/h
|
15
m/s
|
5.4e+7
mm/h
|
16
m/s
|
5.76e+7
mm/h
|
17
m/s
|
6.12e+7
mm/h
|
18
m/s
|
6.48e+7
mm/h
|
19
m/s
|
6.84e+7
mm/h
|
20
m/s
|
7.2e+7
mm/h
|
21
m/s
|
7.56e+7
mm/h
|
22
m/s
|
7.92e+7
mm/h
|
23
m/s
|
8.28e+7
mm/h
|
24
m/s
|
8.64e+7
mm/h
|
25
m/s
|
9e+7
mm/h
|
26
m/s
|
9.36e+7
mm/h
|
27
m/s
|
9.72e+7
mm/h
|
28
m/s
|
1.008e+8
mm/h
|
29
m/s
|
1.044e+8
mm/h
|
30
m/s
|
1.08e+8
mm/h
|
31
m/s
|
1.116e+8
mm/h
|
32
m/s
|
1.152e+8
mm/h
|
33
m/s
|
1.188e+8
mm/h
|
34
m/s
|
1.224e+8
mm/h
|
35
m/s
|
1.26e+8
mm/h
|
36
m/s
|
1.296e+8
mm/h
|
37
m/s
|
1.332e+8
mm/h
|
38
m/s
|
1.368e+8
mm/h
|
39
m/s
|
1.404e+8
mm/h
|
40
m/s
|
1.44e+8
mm/h
|
41
m/s
|
1.476e+8
mm/h
|
42
m/s
|
1.512e+8
mm/h
|
43
m/s
|
1.548e+8
mm/h
|
44
m/s
|
1.584e+8
mm/h
|
45
m/s
|
1.62e+8
mm/h
|
46
m/s
|
1.656e+8
mm/h
|
47
m/s
|
1.692e+8
mm/h
|
48
m/s
|
1.728e+8
mm/h
|
49
m/s
|
1.764e+8
mm/h
|
50
m/s
|
1.8e+8
mm/h
|
51
m/s
|
1.836e+8
mm/h
|
52
m/s
|
1.872e+8
mm/h
|
53
m/s
|
1.908e+8
mm/h
|
54
m/s
|
1.944e+8
mm/h
|
55
m/s
|
1.98e+8
mm/h
|
56
m/s
|
2.016e+8
mm/h
|
57
m/s
|
2.052e+8
mm/h
|
58
m/s
|
2.088e+8
mm/h
|
59
m/s
|
2.124e+8
mm/h
|
60
m/s
|
2.16e+8
mm/h
|
61
m/s
|
2.196e+8
mm/h
|
62
m/s
|
2.232e+8
mm/h
|
63
m/s
|
2.268e+8
mm/h
|
64
m/s
|
2.304e+8
mm/h
|
65
m/s
|
2.34e+8
mm/h
|
66
m/s
|
2.376e+8
mm/h
|
67
m/s
|
2.412e+8
mm/h
|
68
m/s
|
2.448e+8
mm/h
|
69
m/s
|
2.484e+8
mm/h
|
70
m/s
|
2.52e+8
mm/h
|
71
m/s
|
2.556e+8
mm/h
|
72
m/s
|
2.592e+8
mm/h
|
73
m/s
|
2.628e+8
mm/h
|
74
m/s
|
2.664e+8
mm/h
|
75
m/s
|
2.7e+8
mm/h
|
76
m/s
|
2.736e+8
mm/h
|
77
m/s
|
2.772e+8
mm/h
|
78
m/s
|
2.808e+8
mm/h
|
79
m/s
|
2.844e+8
mm/h
|
80
m/s
|
2.88e+8
mm/h
|
81
m/s
|
2.916e+8
mm/h
|
82
m/s
|
2.952e+8
mm/h
|
83
m/s
|
2.988e+8
mm/h
|
84
m/s
|
3.024e+8
mm/h
|
85
m/s
|
3.06e+8
mm/h
|
86
m/s
|
3.096e+8
mm/h
|
87
m/s
|
3.132e+8
mm/h
|
88
m/s
|
3.168e+8
mm/h
|
89
m/s
|
3.204e+8
mm/h
|
90
m/s
|
3.24e+8
mm/h
|
91
m/s
|
3.276e+8
mm/h
|
92
m/s
|
3.312e+8
mm/h
|
93
m/s
|
3.348e+8
mm/h
|
94
m/s
|
3.384e+8
mm/h
|
95
m/s
|
3.42e+8
mm/h
|
96
m/s
|
3.456e+8
mm/h
|
97
m/s
|
3.492e+8
mm/h
|
98
m/s
|
3.528e+8
mm/h
|
99
m/s
|
3.564e+8
mm/h
|
100
m/s
|
3.6e+8
mm/h
|
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