Sumwise

Miles per hour to knots

knots = miles per hour × 0.86897624

Reverse: knots to miles per hour

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How to convert miles per hour to knots

One mile per hour is 0.86897624 knots, so multiply the number of miles per hour by 0.86897624. For example, 20 miles per hour is 20 × 0.86897624 = 17.379525 knots. To go back, divide by the same number, or multiply by 1.150779.

Quick estimate

Multiplying by about 0.9 gets within 3.6% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Speed conversions come up when driving abroad, in running and cycling paces, weather and wind reports, and sailing and flying.

miles per hourknots
1 mph0.86897624 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
11 mph9.558739 kn
12 mph10.427715 kn
13 mph11.296691 kn
14 mph12.165667 kn
15 mph13.034644 kn
16 mph13.90362 kn
17 mph14.772596 kn
18 mph15.641572 kn
19 mph16.510549 kn
20 mph17.379525 kn
25 mph21.724406 kn
30 mph26.069287 kn
40 mph34.75905 kn
50 mph43.448812 kn
60 mph52.138575 kn
70 mph60.828337 kn
75 mph65.173218 kn
80 mph69.518099 kn
90 mph78.207862 kn
100 mph86.897624 kn
120 mph104.277149 kn
150 mph130.346436 kn
200 mph173.795248 kn
250 mph217.24406 kn
300 mph260.692873 kn
400 mph347.590497 kn
500 mph434.488121 kn
750 mph651.732181 kn
1,000 mph868.976242 kn
1,500 mph1,303.46 kn
2,000 mph1,737.95 kn
5,000 mph4,344.88 kn
10,000 mph8,689.76 kn

Questions

How many knots are in a mile per hour?

0.86897624 knots.

How do I convert miles per hour to knots in a spreadsheet?

Put the value in A1 and type =A1*0.86897624, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.