The mile per hour, commonly abbreviated as mph, is a unit of speed originating from the British imperial system and widely used in the United States and the United Kingdom. It’s fascinating to know that the concept of mph has historical significance dating back to the invention of the first automobiles in the late 19th century. The iconic cars of the 1920s, often called “classic cars,” were among the first to publicly advertise their capabilities in mph, including models like the Ford Model T, which had a top speed of about 45 mph.
Interestingly, mph is still the primary speed measurement unit for most road signage in countries such as the US and the UK, even while the rest of the world predominantly uses kilometers per hour (kph). The land-speed record attempts, including those made with the supersonic car “ThrustSSC,” which achieved an astonishing 763 mph in 1997, also emphasize the significance of this unit in measuring extreme speeds.
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.
| Miles per hour | Millimeters per hour |
|---|---|
0
mph
|
0
mm/h
|
2
mph
|
3218688
mm/h
|
4
mph
|
6437376
mm/h
|
6
mph
|
9656064
mm/h
|
8
mph
|
1.28748e+7
mm/h
|
10
mph
|
1.60934e+7
mm/h
|
12
mph
|
1.93121e+7
mm/h
|
14
mph
|
2.25308e+7
mm/h
|
16
mph
|
2.57495e+7
mm/h
|
18
mph
|
2.89682e+7
mm/h
|
20
mph
|
3.21869e+7
mm/h
|
22
mph
|
3.54056e+7
mm/h
|
24
mph
|
3.86243e+7
mm/h
|
26
mph
|
4.18429e+7
mm/h
|
28
mph
|
4.50616e+7
mm/h
|
30
mph
|
4.82803e+7
mm/h
|
32
mph
|
5.1499e+7
mm/h
|
34
mph
|
5.47177e+7
mm/h
|
36
mph
|
5.79364e+7
mm/h
|
38
mph
|
6.11551e+7
mm/h
|
40
mph
|
6.43738e+7
mm/h
|
42
mph
|
6.75924e+7
mm/h
|
44
mph
|
7.08111e+7
mm/h
|
46
mph
|
7.40298e+7
mm/h
|
48
mph
|
7.72485e+7
mm/h
|
50
mph
|
8.04672e+7
mm/h
|
52
mph
|
8.36859e+7
mm/h
|
54
mph
|
8.69046e+7
mm/h
|
56
mph
|
9.01233e+7
mm/h
|
58
mph
|
9.3342e+7
mm/h
|
60
mph
|
9.65606e+7
mm/h
|
62
mph
|
9.97793e+7
mm/h
|
64
mph
|
1.02998e+8
mm/h
|
66
mph
|
1.06217e+8
mm/h
|
68
mph
|
1.09435e+8
mm/h
|
70
mph
|
1.12654e+8
mm/h
|
72
mph
|
1.15873e+8
mm/h
|
74
mph
|
1.19091e+8
mm/h
|
76
mph
|
1.2231e+8
mm/h
|
78
mph
|
1.25529e+8
mm/h
|
80
mph
|
1.28748e+8
mm/h
|
82
mph
|
1.31966e+8
mm/h
|
84
mph
|
1.35185e+8
mm/h
|
86
mph
|
1.38404e+8
mm/h
|
88
mph
|
1.41622e+8
mm/h
|
90
mph
|
1.44841e+8
mm/h
|
92
mph
|
1.4806e+8
mm/h
|
94
mph
|
1.51278e+8
mm/h
|
96
mph
|
1.54497e+8
mm/h
|
98
mph
|
1.57716e+8
mm/h
|
100
mph
|
1.60934e+8
mm/h
|
102
mph
|
1.64153e+8
mm/h
|
104
mph
|
1.67372e+8
mm/h
|
106
mph
|
1.7059e+8
mm/h
|
108
mph
|
1.73809e+8
mm/h
|
110
mph
|
1.77028e+8
mm/h
|
112
mph
|
1.80247e+8
mm/h
|
114
mph
|
1.83465e+8
mm/h
|
116
mph
|
1.86684e+8
mm/h
|
118
mph
|
1.89903e+8
mm/h
|
120
mph
|
1.93121e+8
mm/h
|
122
mph
|
1.9634e+8
mm/h
|
124
mph
|
1.99559e+8
mm/h
|
126
mph
|
2.02777e+8
mm/h
|
128
mph
|
2.05996e+8
mm/h
|
130
mph
|
2.09215e+8
mm/h
|
132
mph
|
2.12433e+8
mm/h
|
134
mph
|
2.15652e+8
mm/h
|
136
mph
|
2.18871e+8
mm/h
|
138
mph
|
2.22089e+8
mm/h
|
140
mph
|
2.25308e+8
mm/h
|
142
mph
|
2.28527e+8
mm/h
|
144
mph
|
2.31746e+8
mm/h
|
146
mph
|
2.34964e+8
mm/h
|
148
mph
|
2.38183e+8
mm/h
|
150
mph
|
2.41402e+8
mm/h
|
If you like the website, share it on social media.