## ››Convert femtometre to millimetre

 femtometer mm

 Did you mean to convert femtometre fermi to megametre millimetre

How many femtometer in 1 mm? The answer is 1000000000000.
We assume you are converting between femtometre and millimetre.
You can view more details on each measurement unit:
femtometer or mm
The SI base unit for length is the metre.
1 metre is equal to 1.0E+15 femtometer, or 1000 mm.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between femtometers and millimetres.
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You can do the reverse unit conversion from mm to femtometer, or enter any two units below:

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## ››Definition: Femtometre

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

So 1 femtometre = 10-15 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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