›› 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 3.3356409519815E-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 quarter
light-second to mile [Britain, ancient]
light-second to fist
light-second to fingerbreadth
light-second to seemeile
light-second to myriametre
light-second to city block [Midwest U.S.]
light-second to city block [East U.S.]
light-second to alen [Swedish]
light-second to gigaparsec