• mph   km/h
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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.

Did you know?

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 to Kilometres per hour Conversion Table

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