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Speed Converter

Convert between km/h, mph, knots and more

Quick Conversions

Meter per Second to Kilometer per Hour Meter per Second to Mile per Hour Meter per Second to Knot Meter per Second to Foot per Second Kilometer per Hour to Meter per Second Kilometer per Hour to Mile per Hour Kilometer per Hour to Knot Kilometer per Hour to Foot per Second Mile per Hour to Meter per Second Mile per Hour to Kilometer per Hour Mile per Hour to Knot Mile per Hour to Foot per Second Knot to Meter per Second Knot to Kilometer per Hour Knot to Mile per Hour Knot to Foot per Second Foot per Second to Meter per Second Foot per Second to Kilometer per Hour Foot per Second to Mile per Hour Foot per Second to Knot

About Speed Conversion

Speed measures how quickly an object moves over a distance in a given time. The SI unit is meters per second (m/s), but in everyday life, kilometers per hour (km/h) is used in most countries while miles per hour (mph) is standard in the United States and United Kingdom for road speeds.

Knots (nautical miles per hour) are the standard speed measurement in aviation and maritime navigation. One knot equals approximately 1.151 mph or 1.852 km/h. This unit is preferred at sea and in the air because it relates directly to the nautical mile, which corresponds to one minute of latitude.

Common reference points: a comfortable walking speed is about 5 km/h (3.1 mph), highway speed limits range from 100-130 km/h (62-81 mph), and the speed of sound at sea level is approximately 343 m/s (1,235 km/h or 767 mph).