## ››Convert kilometre to attometre

 kilometer attometer

How many kilometer in 1 attometer? The answer is 1.0E-21.
We assume you are converting between kilometre and attometre.
You can view more details on each measurement unit:
kilometer or attometer
The SI base unit for length is the metre.
1 metre is equal to 0.001 kilometer, or 1.0E+18 attometer.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between kilometres and attometers.
Type in your own numbers in the form to convert the units!

## ››Quick conversion chart of kilometer to attometer

1 kilometer to attometer = 1.0E+21 attometer

2 kilometer to attometer = 2.0E+21 attometer

3 kilometer to attometer = 3.0E+21 attometer

4 kilometer to attometer = 4.0E+21 attometer

5 kilometer to attometer = 5.0E+21 attometer

6 kilometer to attometer = 6.0E+21 attometer

7 kilometer to attometer = 7.0E+21 attometer

8 kilometer to attometer = 8.0E+21 attometer

9 kilometer to attometer = 9.0E+21 attometer

10 kilometer to attometer = 1.0E+22 attometer

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

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## ››Definition: Kilometer

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: Attometre

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

So 1 attometre = 10-18 metre.

## ››Metric conversions and more

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!