**Full name:** kilometre/hour

**Plural form:** kilometers/hour

**Symbol:** km/h

**Alternate spelling:** km/hr

**Category type:** speed

**Scale factor:** 0.27777777777778

The SI derived unit for speed is the meter/second.

1 meter/second is equal to 3.6 kilometre/hour.

Valid units must be of the **speed** type.

You can use this form to select from known units:

The kilometre per hour (American English: kilometer per hour) is a unit of both speed (scalar) and velocity (vector).

The km/h is the worldwide most commonly used speed unit on road signs and car speedometers.

kilometre/hour to metre/minute

kilometre/hour to speed of sound [air]

kilometre/hour to yard/second

kilometre/hour to inch/minute

kilometre/hour to yard/minute

kilometre/hour to millimetre/microsecond

kilometre/hour to yard/hour

kilometre/hour to nautical mile/day

kilometre/hour to hectometre/hour

kilometre/hour to megametre/second