Miles per Hour to Knots Conversion (mph to kn)

Miles per Hour to Knots Converter

Enter the speed in miles per hour below to convert it to knots.

Result in Knots:

1 mph = 0.868976 kn

How to Convert Miles per Hour to Knots

To convert a measurement in miles per hour to a measurement in knots, multiply the speed by the following conversion ratio: 0.868976 knots/mile per hour.

Since one mile per hour is equal to 0.868976 knots, you can use this simple formula to convert:

knots = miles per hour × 0.868976

The speed in knots is equal to the speed in miles per hour multiplied by 0.868976.

For example, here's how to convert 5 miles per hour to knots using the formula above.

knots = (5 mph × 0.868976) = 4.344881 kn

conversion scale showing miles per hour and equivalent knots speed values

Miles per hour and knots are both units used to measure speed. Calculate speed in miles per hour or knots using our speed calculator or keep reading to learn more about each unit of measure.

What Are Miles per Hour?

Miles per hour are a measurement of speed expressing the distance traveled in miles in one hour.^[1]

The mile per hour is a US customary and imperial unit of speed. Miles per hour can be abbreviated as mph, and are also sometimes abbreviated as mi/h or MPH. For example, 1 mile per hour can be written as 1 mph, 1 mi/h, or 1 MPH.

Miles per hour can be expressed using the formula:
v_mph = d_mi / t_hr

The velocity in miles per hour is equal to the distance in miles divided by time in hours.

Learn more about miles per hour.

What Is a Knot?

One knot is equal to a speed of one nautical mile per hour,^[2] or one minute of latitude per hour.

Knots can be abbreviated as kn, and are also sometimes abbreviated as kt. For example, 1 knot can be written as 1 kn or 1 kt.

Learn more about knots.

Mile per Hour to Knot Conversion Table

Table showing various mile per hour measurements converted to knots.
Miles Per Hour	Knots
1 mph	0.868976 kn
2 mph	1.738 kn
3 mph	2.6069 kn
4 mph	3.4759 kn
5 mph	4.3449 kn
6 mph	5.2139 kn
7 mph	6.0828 kn
8 mph	6.9518 kn
9 mph	7.8208 kn
10 mph	8.6898 kn
11 mph	9.5587 kn
12 mph	10.43 kn
13 mph	11.3 kn
14 mph	12.17 kn
15 mph	13.03 kn
16 mph	13.9 kn
17 mph	14.77 kn
18 mph	15.64 kn
19 mph	16.51 kn
20 mph	17.38 kn
21 mph	18.25 kn
22 mph	19.12 kn
23 mph	19.99 kn
24 mph	20.86 kn
25 mph	21.72 kn
26 mph	22.59 kn
27 mph	23.46 kn
28 mph	24.33 kn
29 mph	25.2 kn
30 mph	26.07 kn
31 mph	26.94 kn
32 mph	27.81 kn
33 mph	28.68 kn
34 mph	29.55 kn
35 mph	30.41 kn
36 mph	31.28 kn
37 mph	32.15 kn
38 mph	33.02 kn
39 mph	33.89 kn
40 mph	34.76 kn

Table showing various mile per hour measurements converted to knots.

Miles Per Hour

Knots

1 mph

0.868976 kn

2 mph

1.738 kn

3 mph

2.6069 kn

4 mph

3.4759 kn

5 mph

4.3449 kn

6 mph

5.2139 kn

7 mph

6.0828 kn

8 mph

6.9518 kn

9 mph

7.8208 kn

10 mph

8.6898 kn

11 mph

9.5587 kn

12 mph

10.43 kn

13 mph

11.3 kn

14 mph

12.17 kn

15 mph

13.03 kn

16 mph

13.9 kn

17 mph

14.77 kn

18 mph

15.64 kn

19 mph

16.51 kn

20 mph

17.38 kn

21 mph

18.25 kn

22 mph

19.12 kn

23 mph

19.99 kn

24 mph

20.86 kn

25 mph

21.72 kn

26 mph

22.59 kn

27 mph

23.46 kn

28 mph

24.33 kn

29 mph

25.2 kn

30 mph

26.07 kn

31 mph

26.94 kn

32 mph

27.81 kn

33 mph

28.68 kn

34 mph

29.55 kn

35 mph

30.41 kn

36 mph

31.28 kn

37 mph

32.15 kn

38 mph

33.02 kn

39 mph

33.89 kn

40 mph

34.76 kn

References

Wikipedia, Miles per hour, https://en.wikipedia.org/wiki/Miles_per_hour
NASA, Knots Versus Miles per Hour, https://www.grc.nasa.gov/WWW/K-12/WindTunnel/Activities/knots_vs_mph.html