1kg/m^3=1x10^3g/1x10^6cm^3=1x10^-3g/cm^3.
1kg/m^3=1x10^3g/1x10^3dm^3=1g/dm^3
1kg/m^3=1kg/1x10^3dm=1x10^-3kg/dm^3
1kg/m^3=1kg/1x10^6cm^3=1x10^-6kg/cm^3
反过来1g/cm^3=1x10^-3kg/1x10^-6m^3=1x10^3kg/m^3
这些单位的换算到高一必修一就有教.