## ››Convert attometre to millimetre

 attometer mm

 Did you mean to convert attometer to megametre millimetre

How many attometer in 1 mm? The answer is 1.0E+15.
We assume you are converting between attometre and millimetre.
You can view more details on each measurement unit:
attometer or mm
The SI base unit for length is the metre.
1 metre is equal to 1.0E+18 attometer, or 1000 mm.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between attometers and millimetres.
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## ››Definition: Attometre

The SI prefix "atto" represents a factor of 10-18, or in exponential notation, 1E-18.

So 1 attometre = 10-18 metre.

## ››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.

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ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!