Miles per Hour to Knots converter

Quick reference

Miles per Hour	Knots
1	0.868976
2	1.737952
5	4.344881
10	8.689762
20	17.379525
25	21.724406
50	43.448812
100	86.897624
250	217.24406
500	434.488121
1,000	868.976242

About speed units

Speed units follow their distance units: miles per hour in the US and UK, kilometers per hour nearly everywhere else, meters per second in physics, and knots (nautical miles per hour) at sea and in the air. A knot is 1.852 km/h exactly, tied to the nautical mile's definition as one minute of latitude. Quick anchors: 60 mph is 96.6 km/h, a 100 km/h motorway limit is 62 mph, and hurricane force starts at 64 knots.

More speed conversions

Knots → Miles per Hour Miles per Hour → Kilometers per Hour Kilometers per Hour → Miles per Hour Knots → Miles per Hour Feet per Second → Miles per Hour Meters per Second → Kilometers per Hour All converters

Frequently asked questions

What is the exact formula for Miles per Hour to Knots?

Multiply the Miles per Hour value by 0.86897624. This comes from the exact unit definitions, not a rounded approximation.

Is this conversion exact?

The underlying ratio is exact where a legal definition exists (for example, 1 inch = 25.4 mm exactly). Displayed results are rounded to six decimal places for readability.

Can I convert Knots back to Miles per Hour?

Yes. Use the reverse converter linked below, or just swap which field you type into: the live converter recalculates either direction.