How to convert miles per hour to knots
To convert a measurement in miles per hour to knots, multiply the value by 0.868976241901. The conversion factor comes from the relationship between both units and the meter per second.
For example, to convert 5 mph to knots: 5 × 0.868976241901 = 4.344881 kn.
What is a mile per hour?
The mile per hour is an imperial unit of speed equal to one mile traveled in one hour, or exactly 0.44704 meters per second. Mph remains the standard for road speed in the United States and United Kingdom, a legacy of the imperial mile that predates widespread metric adoption elsewhere.
Common uses of miles per hour include: Road speed limits in the US and UK; Vehicle speedometers in imperial countries; Wind and storm speed reporting (US); Baseball pitch and sports speeds.
What is a knot?
A knot is a unit of speed equal to one nautical mile per hour, or exactly 1.852 km/h (about 0.514 m/s). The knot dates from the age of sail, when speed was measured by counting knots on a rope paid out behind a ship over a timed interval. It remains standard in marine and air navigation.
Common uses of knots include: Maritime navigation and ship speed; Aviation airspeed and ground speed; Wind speed in marine forecasts; Ocean current measurements.
Miles per hour to knots worked examples
Here are some common values converted:
1 mph = 0.868976241901 kn 5 mph = 4.344881 kn 10 mph = 8.689762 kn 50 mph = 43.448812 kn 100 mph = 86.897624 kn
Frequently asked questions
How many knots are in one mile per hour?
One mile per hour (mph) equals 0.868976241901 knots (kn). Multiply any value in miles per hour by 0.868976241901 to convert to knots.
How do I convert miles per hour to knots?
Multiply the value in miles per hour by 0.868976241901. For example, 5 mph × 0.868976241901 = 4.344881 kn.
How do I convert knots to miles per hour?
Multiply the value in knots by 1.150779, or divide by 0.868976241901. Use the swap button on the converter above to reverse the direction.
Is the mile per hour to knot conversion exact?
Conversions between m/s, km/h, mph, knots and ft/s are exact by definition. Mach uses the speed of sound at sea level and 15°C (340.29 m/s), which varies with temperature and altitude.
What is the formula for miles per hour to knots?
The formula is: kn = mph × 0.868976241901. This comes from the definition of both units relative to the meter per second.