How many femtometer in 1 millimicron?
The answer is 1000000.
We assume you are converting between femtometre and millimicron.
You can view more details on each measurement unit: femtometer or
millimicron
The SI base unit for length is the metre.
1 metre is equal to 1.0E+15 femtometer, or 1000000000 millimicron.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between femtometers and millimicrons.
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You can do the reverse unit conversion from
millimicron to femtometer, or enter any two units below:

The SI prefix "femto" represents a factor of
10^{-15}, or in exponential notation, 1E-15.

So 1 femtometre = 10^{-15} metre.

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

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