## ››Convert millimicron to gigametre

 millimicron gigameter

How many millimicron in 1 gigameter? The answer is 1.0E+18.
We assume you are converting between millimicron and gigametre.
You can view more details on each measurement unit:
millimicron or gigameter
The SI base unit for length is the metre.
1 metre is equal to 1000000000 millimicron, or 1.0E-9 gigameter.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between millimicrons and gigameters.
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## ››Definition: Millimicron

The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.

So 1 millimicron = 10-3 microns.

The definition of a micron is as follows:

a metric unit of length equal to one millionth of a meter

## ››Definition: Gigameter

A gigametre (American spelling: gigameter, symbol: Gm) is a unit of length equal to 10^9 metres. Its customary equivalent is 621,371 miles.

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