Miles per hour to Knots Converter mph → kn

1 mile per hour (mph) = 0.8689762419 knots (kn). Type a value below — the conversion happens instantly, entirely on your device.

From

1 mph = 0.8689762419 kn

Precision

25 miles per hour = 21.724406 knots

25 × 0.868976 = 21.724406

1 mph equals 0.868976 kn, so multiplying by 0.868976 converts the value. The result describes the exact same quantity — only the measuring stick changes.

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How to convert miles per hour to knots

knots = miles per hour × 0.8689762419 — multiply the mile per hour value by 0.868976.

Example: 25 mph = 21.7244 kn.

To convert the other way: miles per hour = knots ÷ 0.8689762419 — or use the dedicated kn to mph converter .

Mph-to-knots converts land speeds to the nautical unit used by boats and aircraft: 25 mph is 21.7 knots. One mph is 0.869 knots, so knots are always the smaller number.

Miles per hour to Knots conversion table

Miles per hour (mph)	Knots (kn)
0.1	0.086897624
0.25	0.21724406
0.5	0.43448812
1	0.86897624
2	1.7379525
3	2.6069287
4	3.475905
5	4.3448812
6	5.2138575
7	6.0828337
8	6.9518099
9	7.8207862
10	8.6897624
15	13.034644
20	17.379525
25	21.724406
30	26.069287
40	34.75905
50	43.448812
75	65.173218
100	86.897624
250	217.24406
500	434.48812
1000	868.97624

About the units

What is a mile per hour?

Miles per hour (mph) is the road-speed unit of the United States and United Kingdom. 1 mph is exactly 1.609344 km/h.

What is a knot?

A knot (kn) is one nautical mile per hour, exactly 1.852 km/h. Aircraft, ships and wind speeds in meteorology are measured in knots.

Frequently asked questions

How many knots are in 1 mile per hour?

1 mile per hour (mph) = 0.8689762419 knots (kn).

What is the formula to convert miles per hour to knots?

knots = miles per hour × 0.8689762419 — multiply the mile per hour value by 0.868976.

How do I convert mph to kn without a calculator?

Multiply by 0.869 for a close estimate. Exact factor: 1 mph = 0.8689762419 kn.

Is this mph-to-kn converter accurate and private?

Yes. It uses the exact internationally defined conversion factors and computes results locally in your browser — your input is never sent to a server, and the page keeps working offline.