Convert between km/h, mph, m/s, knots, and other speed units.
Speed conversion is essential for international travel, sports, aviation, and science. Our Speed Converter instantly converts between km/h, mph, m/s, knots, and feet per second, supporting accurate speed measurements across different measurement systems worldwide.
Kilometers per Hour (km/h): Metric unit used worldwide. Road speed limits typically expressed in km/h.
Miles per Hour (mph): Imperial unit used primarily in the United States, UK, and some other countries.
Meters per Second (m/s): SI unit used in physics, science, and technical applications.
Knots: Nautical speed unit used in maritime and aviation industries. 1 knot = 1 nautical mile per hour.
Feet per Second (ft/s): Imperial unit used in some technical and engineering applications.
International Travel: Understanding speed limits and road signs in different countries
Sports: Converting athlete speeds between systems for comparison and records
Aviation: Aircraft speeds often expressed in knots, requiring conversion to other units
Maritime: Nautical speeds measured in knots for shipping and navigation
Physics: Scientific calculations often require m/s conversions
Automotive: Converting speedometer readings between km/h and mph
Historical development, regional standards, and specific industry needs led to different units. Aviation, maritime, and automotive industries each have preferred units.
A knot is one nautical mile per hour, used by sailors and pilots. It's approximately 1.15 mph or 1.85 km/h.
All units are equally accurate; they're just different ways to measure the same thing. Choose based on context and location.