## ››Convert megametre to zettametre

 megametre zettametre

How many megametre in 1 zettametre? The answer is 1.0E+15.
We assume you are converting between megametre and zettametre.
You can view more details on each measurement unit:
megametre or zettametre
The SI base unit for length is the metre.
1 metre is equal to 1.0E-6 megametre, or 1.0E-21 zettametre.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between megameters and zettameters.
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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: Zettametre

The SI prefix "zetta" represents a factor of 1021, or in exponential notation, 1E21.

So 1 zettametre = 1021 metre.

## ››Metric conversions and more

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