Knots is a measure of speed, so knots per hour is actually a measure of acceleration. The table below gives conversions from KNOTS to miles per hour.
KTS to MPH5
Knots
=
5.8
MPH
10
Knots
=
11.5
MPH
15
Knots
=
17.3
MPH
20
Knots
Conversion table for
knots to miles per hour
20
Knots
=
23.0
MPH
25
Knots
=
28.8
MPH
30
Knots
=
34.6
MPH
35
Knots
=
40.3
MPH
40
Knots
=
46.1
MPH
45
Knots
=
51.8
MPH
50
Knots
=
57.6
MPH
55
Knots
=
63.4
MPH
60
Knots
=
69.1
MPH
65
Knots
=
74.9
MPH
70
Knots
=
80.6
MPH
75
Knots
=
86.4
MPH
80
Knots
=
92.2
MPH
85
Knots
=
97.9
MPH
90
Knots
=
103.7
MPH
95
Knots
=
109.4
MPH
100
Knots
=
115.2
MPH
105
Knots
=
121.0
MPH
110
Knots
=
126.7
MPH
115
Knots
=
132.5
MPH
120
Knots
=
138.2
MPH
125
Knots
=
144.0
MPH
130
Knots
=
149.8
MPH
135
Knots
=
155.5
MPH
140
Knots
=
161.3
MPH
145
Knots
=
167.0
MPH
150
Knots
=
172.8
MPH
* * * * *
In short,
1 knot = 1.150 799 mph (approx 1.151 mph)
and
1 MPH = 0.868 976 knots (approx 0.869 kts)
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mph x 0.868976242 = knots per hour
49 knots=56.388193 miles per hour
439 knots=505.192178 miles per hour
11 knots=12.6585739 miles per hour
40 knots=46.0311779 miles per hour