Convert Miles Per Hour to Knots

1 mph = 0.868976 kn. Enter any value below.

Converted to every unit

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Miles Per Hour to Knots formula

kn = mph × 0.868976

Miles per hour is the speed unit used on US and UK roads. A knot is one nautical mile per hour, used in aviation and shipping.

Worked example

To convert 5 mph, multiply by 0.868976: 5 mph × 0.868976 = 4.344881 kn.

Miles Per Hour to Knots conversion table

Miles Per HourKnots
1 mph0.868976 kn
2 mph1.737952 kn
3 mph2.606929 kn
4 mph3.475905 kn
5 mph4.344881 kn
6 mph5.213857 kn
7 mph6.082834 kn
8 mph6.95181 kn
9 mph7.820786 kn
10 mph8.689762 kn
12 mph10.427715 kn
15 mph13.034644 kn
20 mph17.379525 kn
25 mph21.724406 kn
30 mph26.069287 kn
40 mph34.75905 kn
50 mph43.448812 kn
75 mph65.173218 kn
100 mph86.897624 kn
250 mph217.24406 kn
500 mph434.488121 kn
1,000 mph868.976242 kn

Frequently asked questions

How many knots are in a miles per hour?

1 mph equals 0.868976 kn.

How do I convert miles per hour to knots?

Use the formula kn = mph × 0.868976. For example, 5 mph = 4.344881 kn.

Last reviewed: October 2026 · Uses exact, internationally defined conversion factors.