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mph (mph) → knot (knot)

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Use our free online converter to convert between units instantly. Enter any value in the field above to get accurate results. No signup or download required—all conversions run in your browser. Our calculator uses standard conversion factors for reliability.

0
mph=knot
1=0.868974
5=4.34487
10=8.689741
20=17.379482
50=43.448704
100=86.897408
120=104.27689
200=173.794816

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Brief explanation: mph to knot

km/h is the most common unit globally. m/s is used in physics. mph is standard in the USA. Knot is used in aviation and maritime. Walking speed is about 5 km/h, a car on a highway ~100 km/h. Speed of sound is about 343 m/s. To convert km/h to mph, multiply by 0.621. To convert mph to km/h, multiply by 1.609. Our converter handles all these units accurately.

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Common conversion examples: mph to knot

Reference values for quick comparison. Use the converter above for any amount.

  • 1 mph=0.869 knot
  • 50 mph=43.4487 knot
  • 100 mph=86.8974 knot

About the Units

mph (mph)

Definition: Miles per hour (mph) is a unit of speed. It measures distance in miles traveled per hour. It is used for vehicle speed in the United States and United Kingdom.
History: mph became standard with the adoption of the mile for road distances. Speed limits and speedometers in the US and UK use mph. Most of the world uses km/h.
Current use: mph is used for speed limits, vehicle speed, and wind speed in the US and UK. One mph ≈ 1.609 km/h. Marathon pace is sometimes given in min/mile.

knot (knot)

Definition: A knot (kn) is a unit of speed used in maritime and aviation. One knot equals one nautical mile per hour, or approximately 1.852 km/h. It is the standard for ships and aircraft.
History: The knot originated from the practice of measuring ship speed using a rope with knots at intervals. The nautical mile is based on the Earth's circumference. The knot remains standard in navigation.
Current use: Knots are used for ship speed, aircraft speed, and wind speed in marine and aviation. Weather reports for sailors use knots. One knot ≈ 1.15 mph.

Sources

Conversion factors and unit definitions follow international standards. For authoritative references, see: