How many arms-length in 1 light-second? The answer is 428274940. We assume you are converting between arms-length and light second. You can view more details on each measurement unit: arms-length or light-second The SI base unit for length is the metre. 1 metre is equal to 1.4285714285714 arms-length, 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 arms-length and light seconds. Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from light-second to arms-length, or enter any two units below:
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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