›› Measurement unit: light second

Full name: light second

Plural form: light seconds

Alternate spelling: lightsecond

Category type: length

Scale factor: 299792458


›› SI unit: metre

The SI base unit for length is the metre.
1 metre is equal to 3.33564095198E-9 light second.


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›› Definition: Light-second

A light-second is a unit of length. It is defined as the distance light travels in an absolute vacuum in one second or 299,792,458 meters. Note that this value is considered exact, since the meter is actually (as of 1983) defined in terms of the light second. It is just over 186,282 miles and almost 109 feet.


›› Sample conversions: light second

light second to klick
light second to kiloparsec
light second to perch [Ireland]
light second to gigaparsec
light second to fall [English]
light second to astronomical unit
light second to vara [South America]
light second to pes
light second to mile [international]
light second to city block [East U.S.]