How many light-day in 1 light-second? The answer is 1.1574074074074E-5. We assume you are converting between light day and light second. You can view more details on each measurement unit: light-day or light-second The SI base unit for length is the metre. 1 metre is equal to 3.8606955462749E-14 light-day, or 3.3356409519815E-9 light-second. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between light days and light seconds. Type in your own numbers in the form to convert the units!
1 light-day to light-second = 86400 light-second
2 light-day to light-second = 172800 light-second
3 light-day to light-second = 259200 light-second
4 light-day to light-second = 345600 light-second
5 light-day to light-second = 432000 light-second
6 light-day to light-second = 518400 light-second
7 light-day to light-second = 604800 light-second
8 light-day to light-second = 691200 light-second
9 light-day to light-second = 777600 light-second
10 light-day to light-second = 864000 light-second
You can do the reverse unit conversion from light-second to light-day, or enter any two units below:
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.
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.
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