How many kilometer in 1 femtometer?
The answer is 1.0E-18.
We assume you are converting between kilometre and femtometre.
You can view more details on each measurement unit: kilometer or
femtometer
The SI base unit for length is the metre.
1 metre is equal to 0.001 kilometer, or 1.0E+15 femtometer.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between kilometres and femtometers.
Type in your own numbers in the form to convert the units!

››Quick conversion chart of kilometer to femtometer

1 kilometer to femtometer = 1.0E+18 femtometer

2 kilometer to femtometer = 2.0E+18 femtometer

3 kilometer to femtometer = 3.0E+18 femtometer

4 kilometer to femtometer = 4.0E+18 femtometer

5 kilometer to femtometer = 5.0E+18 femtometer

6 kilometer to femtometer = 6.0E+18 femtometer

7 kilometer to femtometer = 7.0E+18 femtometer

8 kilometer to femtometer = 8.0E+18 femtometer

9 kilometer to femtometer = 9.0E+18 femtometer

10 kilometer to femtometer = 1.0E+19 femtometer

››Want other units?

You can do the reverse unit conversion from
femtometer to kilometer, or enter any two units below:

A kilometre (American spelling: kilometer, symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). It is approximately equal to 0.621 miles, 1094 yards or 3281 feet.

››Definition: Femtometre

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

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

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