40 Knots to Miles per Hour
Result
40 kn = 46.0311 mph
40 kn = 46.0311 mph
How to Convert knots to miles per hour
To convert knots to miles per hour, multiply the value by the conversion factor:
Reverse: 46.0311 miles per hour = 40 knots
Reverse: 46.0311 miles per hour = 40 knots
miles per hour to knots converterAbout These Units
knots (kn)
The knot is a unit with a literal history: sailors used to measure speed by throwing a log overboard attached to a rope with knots tied at specific intervals. They counted the knots that slipped through their hands in a set time. One knot equals one nautical mile per hour. It remains the global standard for maritime and aviation operations.
A large cruise ship travels at about 20-25 knots.
Commonly used in: Ship speed, Aircraft airspeed, Cruise missile velocity, Wind speed (Marine), Naval operations.
miles per hour (mph)
Miles per hour (mph) is the standard speed unit for the United States and United Kingdom. It has been used since the days of stagecoaches but became codified with the rise of the automobile and the need for speed limits. Despite metrication efforts, the UK retains mph for its roads, keeping it aligned with the US system.
US highway speeds are typically 65-75 mph.
Commonly used in: US & UK Speed limits, Baseball pitch speeds, Tennis serve speeds, Hurricane wind speeds (US), NASCAR.