## ››Convert millimetre to zettametre

 mm zettameter

 Did you mean to convert megametre millimetre to zettameter

How many mm in 1 zettameter? The answer is 1.0E+24.
We assume you are converting between millimetre and zettametre.
You can view more details on each measurement unit:
mm or zettameter
The SI base unit for length is the metre.
1 metre is equal to 1000 mm, or 1.0E-21 zettameter.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between millimetres and zettameters.
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## ››Definition: Millimeter

A millimetre (American spelling: millimeter, symbol mm) is one thousandth of a metre, which is the International System of Units (SI) base unit of length. The millimetre is part of a metric system. A corresponding unit of area is the square millimetre and a corresponding unit of volume is the cubic millimetre.

## ››Definition: Zettametre

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

So 1 zettametre = 1021 metre.

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