## ››Convert megametre to gigalight year

 megameter gigalight-year

How many megameter in 1 gigalight-year? The answer is 9.454254955488E+18.
We assume you are converting between megametre and gigalight year.
You can view more details on each measurement unit:
megameter or gigalight-year
The SI base unit for length is the metre.
1 metre is equal to 1.0E-6 megameter, or 1.0577248071986E-25 gigalight-year.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between megameters and gigalight years.
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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: Gigalight-year

One gigalight-year, abbreviation "Gly", is one billion light-years — one of the largest distance measures used. One gigalight-year equals 306.601 million parsecs, or roughly one-thirteenth the distance to the horizon of the observable universe (dictated by the cosmic background radiation). Gigalight-years are typically used to measure distances to supergalactic structures, such as clusters of quasars or the Great Wall.

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