# Kilometer per hour conversions

speed conversions » kilometer per hour conversionsThe kilometer per hour conversion selector above selects the speed/velocity measurement unit to convert to starting from kilometers per hour (km/h). To make a conversion starting from a unit of speed other than kilometer per hour, simply click on the "Reset" button.

## What is kilometer per hour?

The **kilometre per hour** (or **kilometer per hour**) is a unit of speed in the metric system equal to about 0.277778 meters per second (1 km/h = 0.277778 m/s), the derived unit of speed in the International System of Units (SI). It is also equal to approximately 0.621371 miles per hour (mph or mi/h), or 0.911344 feet per second (ft/s), or 10.936133 inches per second (in/s) or 0.539957 knots (kn).

The speed is the distance traveled by an object during a period of time. Thus, kilometers per hour (or kilometers/hour) show how many kilometers are traveled in one hour. The kilometer is a unit of length in the metric system while the hour is a unit of time.

Kilometer per hour is widely used around the world in sports, road signs, and cars and aircrafts speedometers.

*Symbol:*

km/h

*Plural:*

kilometers per hour

*aka:*

**kilometre/hour**, kilometer per hour (plural: kilometers per hour, US spelling), **kilometer/hour** (plural: kilometers/hour, US spelling)

## Kilometer per hour conversions: direct links

A detailed list with conversions from kilometers per hour to other (metric, imperial, or customary) speed and velocity measurement units is shown below.

- kilometer per hour to centimeter per second (km/h to cm/s)
- kilometer per hour to foot per hour (km/h to ft/h)
- kilometer per hour to foot per minute (km/h to ft/min)
- kilometer per hour to foot per second (km/h to ft/s)
- kilometer per hour to inch per hour (km/h to in/h)
- kilometer per hour to inch per minute (km/h to in/min)
- kilometer per hour to inch per second (km/h to in/s)
- kilometer per hour to kilometer per minute (km/h to km/min)
- kilometer per hour to kilometer per second (km/h to km/s)
- kilometer per hour to knot (km/h to kn)
- kilometer per hour to meter per hour (km/h to m/h)
- kilometer per hour to meter per minute (km/h to m/min)
- kilometer per hour to meter per second (km/h to m/s)
- kilometer per hour to micrometer per second (km/h to μm/s)
- kilometer per hour to mile per hour (km/h to mph)
- kilometer per hour to mile per minute (km/h to mpm)
- kilometer per hour to mile per second (km/h to mps)
- kilometer per hour to millimeter per second (km/h to mm/s)
- kilometer per hour to nautical mile per day (km/h to nmi/d)
- kilometer per hour to nautical mile per hour (km/h to nmi/h)
- kilometer per hour to speed of light (km/h to c)
- kilometer per hour to speed of sound
- kilometer per hour to walking speed