306 decimeters in kilometers
Result
The conversion result is: 306 decimeters is equivalent to 0.0306 kilometers.[1]
Conversion formula
How to convert 306 decimeters to kilometers?
We know (by definition) that: 1 dm = 0.0001 km.
We can set up a proportion to solve for the number of kilometers.
1 dm / 306 dm = 0.0001 km / x km
Now, we cross multiply to solve for our unknown x:
x km = (306 dm / 1 dm) * 0.0001 km → x km = 0.030600000000000002 km
Conclusion:
306 dm = 0.030600000000000002 km

Conversion in the opposite direction
The inverse of the conversion factor is that 1 kilometer is equal to 32.6797385620915 times 306 decimeters.
It can also be expressed as: 306 decimeters is equal to 1 / 32.6797385620915 kilometers.
Approximation
An approximate numerical result would be: three hundred and six decimeters is about zero point zero three kilometers, or alternatively, a kilometer is about thirty-two point six seven times three hundred and six decimeters.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.