• knot   mph
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The knot, a unit of speed equal to one nautical mile per hour, has its origins in the age of sail. Mariners used a device known as the “common log” to measure a ship’s speed. This involved a wooden log attached to a rope with knots tied at uniform intervals. By counting the knots that passed through a sailor’s hands over a set period, they could determine the ship’s speed. Today, knots remain an essential measure in aviation and maritime contexts, underscoring how deeply it is embedded in navigation traditions.

Interestingly, the nautical mile, corresponding to one minute of latitude, is roughly 1.1508 miles. This makes the knot not only a unique unit for speed but also a reminder of the Earth’s curvature and ancient navigation skills.

Did you know?

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.

> Knots to Miles per hour Conversion Table

Knots Miles per hour
0 knot 0 mph
1 knot 1.15078 mph
2 knot 2.30156 mph
3 knot 3.45234 mph
4 knot 4.60312 mph
5 knot 5.7539 mph
6 knot 6.90467 mph
7 knot 8.05545 mph
8 knot 9.20623 mph
9 knot 10.35701 mph
10 knot 11.50779 mph
11 knot 12.65857 mph
12 knot 13.80935 mph
13 knot 14.96013 mph
14 knot 16.11091 mph
15 knot 17.26169 mph
16 knot 18.41246 mph
17 knot 19.56324 mph
18 knot 20.71402 mph
19 knot 21.8648 mph
20 knot 23.01558 mph
21 knot 24.16636 mph
22 knot 25.31714 mph
23 knot 26.46792 mph
24 knot 27.6187 mph
25 knot 28.76948 mph
26 knot 29.92025 mph
27 knot 31.07103 mph
28 knot 32.22181 mph
29 knot 33.37259 mph
30 knot 34.52337 mph
31 knot 35.67415 mph
32 knot 36.82493 mph
33 knot 37.97571 mph
34 knot 39.12649 mph
35 knot 40.27727 mph
36 knot 41.42804 mph
37 knot 42.57882 mph
38 knot 43.7296 mph
39 knot 44.88038 mph
40 knot 46.03116 mph
41 knot 47.18194 mph
42 knot 48.33272 mph
43 knot 49.4835 mph
44 knot 50.63428 mph
45 knot 51.78506 mph
46 knot 52.93583 mph
47 knot 54.08661 mph
48 knot 55.23739 mph
49 knot 56.38817 mph
50 knot 57.53895 mph
51 knot 58.68973 mph
52 knot 59.84051 mph
53 knot 60.99129 mph
54 knot 62.14207 mph
55 knot 63.29285 mph
56 knot 64.44362 mph
57 knot 65.5944 mph
58 knot 66.74518 mph
59 knot 67.89596 mph
60 knot 69.04674 mph
61 knot 70.19752 mph
62 knot 71.3483 mph
63 knot 72.49908 mph
64 knot 73.64986 mph
65 knot 74.80064 mph
66 knot 75.95141 mph
67 knot 77.10219 mph
68 knot 78.25297 mph
69 knot 79.40375 mph
70 knot 80.55453 mph
71 knot 81.70531 mph
72 knot 82.85609 mph
73 knot 84.00687 mph
74 knot 85.15765 mph
75 knot 86.30843 mph
76 knot 87.4592 mph
77 knot 88.60998 mph
78 knot 89.76076 mph
79 knot 90.91154 mph
80 knot 92.06232 mph
81 knot 93.2131 mph
82 knot 94.36388 mph
83 knot 95.51466 mph
84 knot 96.66544 mph
85 knot 97.81622 mph
86 knot 98.96699 mph
87 knot 100.11777 mph
88 knot 101.26855 mph
89 knot 102.41933 mph
90 knot 103.57011 mph
91 knot 104.72089 mph
92 knot 105.87167 mph
93 knot 107.02245 mph
94 knot 108.17323 mph
95 knot 109.32401 mph
96 knot 110.47478 mph
97 knot 111.62556 mph
98 knot 112.77634 mph
99 knot 113.92712 mph
100 knot 115.0779 mph