The result of your conversion between erg and hectogram/cubic kilometer appears here
To convert between Erg and Hectogram/cubic Kilometer you have to do the following:
First divide 0.0000001 / 0.1/1.0E+9 = 1000.
Then multiply the amount of Erg you want to convert to Hectogram/cubic Kilometer, use the chart below to guide you.
Symbol: erg
No description
Symbol: hg/km³
No description