In kinematics, speed is a scalar quantity, because the speed of an object is the designation of the movement (the rate of change of its position). The Italian physicist Galileo Galilei defined speed as the distance covered per unit of time. In the International System of Units the speed is measured in meters per second. But in everyday life, the more commonly used unit of speed is kilometer per hour and miles per hour in the US and the UK. The knot is typically used in air and sea travel.
Calculator of speed units
To convert from
To convert to
km/h
= mph
The basic units of speed | |
Foot per minute | ft/min |
Foot per second | ft/sec |
Kilometer per hour | km/h |
Kilometer per second | km/sec |
Knot | knot |
Meter per second | m/sec |
Mile per hour | mph |
Other units | |
Centimeter per hour | cm/h |
Centimeter per minute | cm/min |
Centimeter per second | cm/sec |
Foot per hour | ft/h |
Kilometer per minute | km/min |
Speed of light | s |
Mach number (At Sea Level) | mach |
Mach number (SI) | |
Meter per hour | m/h |
Meter per minute | m/min |
Miles per minute | mi/min |
Miles per hour | mi/s |
Yard per hour | yd/h |
Yard per minute | yd/min |
Yard per second | yd/s |
The basic units of speed | |
Foot per minute | ft/min |
Foot per second | ft/sec |
Kilometer per hour | km/h |
Kilometer per second | km/sec |
Knot | knot |
Meter per second | m/sec |
Mile per hour | mph |
Other units | |
Centimeter per hour | cm/h |
Centimeter per minute | cm/min |
Centimeter per second | cm/sec |
Foot per hour | ft/h |
Kilometer per minute | km/min |
Speed of light | s |
Mach number (At Sea Level) | mach |
Mach number (SI) | Mach number |
Meter per hour | m/h |
Meter per minute | m/min |
Miles per minute | mi/min |
Miles per hour | mi/s |
Yard per hour | yd/h |
Yard per minute | yd/min |
Yard per second | yd/s |
The conversion result: