What percent of an iceberg is below water and why?

Sea water on the other hand is more dense since it has salts, therefore we shall use Rhow = 1.035 g/cm3 (or 1035 kg/m3). So, the fraction of iceunderwater, Vw/Vi, is given by the ratio of densities Rhoi/Rhow=0.87. Over 87% of an iceberg's volume (and mass) is underwater.

Size and shape of continents