How many kilometer in 1 light-day?
The answer is 25902068371.2.
We assume you are converting between kilometre and light day.
You can view more details on each measurement unit:
kilometer or light-day
The SI base unit for length is the metre.
1 metre is equal to 0.001 kilometer, or 3.8606955462749E-14 light-day.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between kilometres and light days.
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You can do the reverse unit conversion from light-day to kilometer, or enter any two units below:
kilometer to mile
kilometer to pied de roi
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kilometer to spat
A kilometre (American spelling: kilometer, symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). It is approximately equal to 0.621 miles, 1094 yards or 3281 feet.
A light day (also written light-day) is a unit of length. It is defined as the distance light travels in an absolute vacuum in one day (of 86,400 seconds) or 25,902,068,371,200 metres (~26 Tm).
Note that this value is exact, since the metre is actually defined in terms of the speed of light. The light day isn't very frequently used at all since there are few astronomical objects or distances of that magnitude; the Oort cloud, for example, is thought to extend between 290 and 580 light-days out from the Sun.
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