›› Convert megametre to light second


›› More information from the unit converter

How many megametre in 1 light-second? The answer is 299.792458.
We assume you are converting between megametre and light second.
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megametre or light-second
The SI base unit for length is the metre.
1 metre is equal to 1.0E-6 megametre, 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 megameters and light seconds.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of megametre to light-second

1 megametre to light-second = 0.00334 light-second

10 megametre to light-second = 0.03336 light-second

50 megametre to light-second = 0.16678 light-second

100 megametre to light-second = 0.33356 light-second

200 megametre to light-second = 0.66713 light-second

500 megametre to light-second = 1.66782 light-second

1000 megametre to light-second = 3.33564 light-second

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›› Definition: Megameter

A megametre (American spelling: megameter, symbol: Mm) is a unit of length equal to 10^6 metres (from the Greek words megas = big and metro = count/measure). Its customary equivalent is 621.37 miles.

›› 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.

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