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.
Kilometres per hour (km/h) is a widely used metric unit of speed, especially on roads and highways around the world. Interestingly, despite its global prevalence, the U.S. primarily uses miles per hour. However, km/h is the standard for most countries, offering a glimpse into global unity as it’s part of the International System of Units (SI). The history of speed limits tied to km/h is quite fascinating. The first speed limit laws, introduced in the United Kingdom in the 19th century, regulated horse-drawn carriages, long before motor vehicles were common. Today, km/h aids not only in measuring speed but also in showcasing technological advancements in transportation engineering as speeds increase with improved vehicle designs.
Miles per hour | Kilometres per hour |
---|---|
0
mph
|
0
km/h
|
2
mph
|
3.21869
km/h
|
4
mph
|
6.43738
km/h
|
6
mph
|
9.65606
km/h
|
8
mph
|
12.87475
km/h
|
10
mph
|
16.09344
km/h
|
12
mph
|
19.31213
km/h
|
14
mph
|
22.53082
km/h
|
16
mph
|
25.7495
km/h
|
18
mph
|
28.96819
km/h
|
20
mph
|
32.18688
km/h
|
22
mph
|
35.40557
km/h
|
24
mph
|
38.62426
km/h
|
26
mph
|
41.84294
km/h
|
28
mph
|
45.06163
km/h
|
30
mph
|
48.28032
km/h
|
32
mph
|
51.49901
km/h
|
34
mph
|
54.7177
km/h
|
36
mph
|
57.93638
km/h
|
38
mph
|
61.15507
km/h
|
40
mph
|
64.37376
km/h
|
42
mph
|
67.59245
km/h
|
44
mph
|
70.81114
km/h
|
46
mph
|
74.02982
km/h
|
48
mph
|
77.24851
km/h
|
50
mph
|
80.4672
km/h
|
52
mph
|
83.68589
km/h
|
54
mph
|
86.90458
km/h
|
56
mph
|
90.12326
km/h
|
58
mph
|
93.34195
km/h
|
60
mph
|
96.56064
km/h
|
62
mph
|
99.77933
km/h
|
64
mph
|
102.99802
km/h
|
66
mph
|
106.2167
km/h
|
68
mph
|
109.43539
km/h
|
70
mph
|
112.65408
km/h
|
72
mph
|
115.87277
km/h
|
74
mph
|
119.09146
km/h
|
76
mph
|
122.31014
km/h
|
78
mph
|
125.52883
km/h
|
80
mph
|
128.74752
km/h
|
82
mph
|
131.96621
km/h
|
84
mph
|
135.1849
km/h
|
86
mph
|
138.40358
km/h
|
88
mph
|
141.62227
km/h
|
90
mph
|
144.84096
km/h
|
92
mph
|
148.05965
km/h
|
94
mph
|
151.27834
km/h
|
96
mph
|
154.49702
km/h
|
98
mph
|
157.71571
km/h
|
100
mph
|
160.9344
km/h
|
102
mph
|
164.15309
km/h
|
104
mph
|
167.37178
km/h
|
106
mph
|
170.59046
km/h
|
108
mph
|
173.80915
km/h
|
110
mph
|
177.02784
km/h
|
112
mph
|
180.24653
km/h
|
114
mph
|
183.46522
km/h
|
116
mph
|
186.6839
km/h
|
118
mph
|
189.90259
km/h
|
120
mph
|
193.12128
km/h
|
122
mph
|
196.33997
km/h
|
124
mph
|
199.55866
km/h
|
126
mph
|
202.77734
km/h
|
128
mph
|
205.99603
km/h
|
130
mph
|
209.21472
km/h
|
132
mph
|
212.43341
km/h
|
134
mph
|
215.6521
km/h
|
136
mph
|
218.87078
km/h
|
138
mph
|
222.08947
km/h
|
140
mph
|
225.30816
km/h
|
142
mph
|
228.52685
km/h
|
144
mph
|
231.74554
km/h
|
146
mph
|
234.96422
km/h
|
148
mph
|
238.18291
km/h
|
150
mph
|
241.4016
km/h
|
If you like the website, share it on social media.