## Measurement unit: light-hour

**Full name:** light hour

**Plural form:** light hours

**Alternate spelling:** lighthour

**Category type:** length

**Scale factor:** 1079252848800

## SI unit: metre

The SI base unit for length is the metre.

1 metre is equal to 9.2656693110598E-13 light-hour.

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

You can use this form to select from known units:

## Definition: Light-hour

A light-hour (also written light hour) is a unit of length. It is the distance travelled by light in vacuum in one hour. Based on the current definition of the metre a light-hour is equal to 1,079,252,848,800 metres (~1.08 Tm).

## Sample conversions: light-hour