Density Converter

Convert kg/m³, lb/ft³, g/cm³, and specific gravity relative to water (1000 kg/m³).

Density is mass divided by volume, and this tool restates a single figure across kg/m³, lb/ft³, g/cm³ and specific gravity. Your entry is scaled by its own unit's factor into kilograms per cubic metre — the base the engine holds internally — and then scaled back out into each remaining column, so every reading rises and falls with the number you type. A pound per cubic foot works out at 16.01846337396 kg/m³. A gram per cubic centimetre is 1000 kg/m³, and specific gravity here is nothing more than kg/m³ divided by that same 1000, which is why those two columns always print identical digits. The flat 1000 reference is the caveat worth knowing. Real fresh water sits at 999.97 kg/m³ near 4 °C and around 997 kg/m³ at 25 °C, so a bench measurement taken against room-temperature water disagrees with this column by roughly three parts in a thousand. There is no temperature field, no pressure field and no compressibility model, so gas densities are only as good as the conditions your input already assumed. API gravity, Baumé and Brix are rescalings rather than multiplicative factors and are deliberately absent.