A simple and easy-to-use specific gravity/ SG/ density unit converter. This app is free of add. Available density unit conversions include: mg/mL. mg/mm^3. mg/cm^3. g/cm^3. g/mm^3. g/mL. g/L. Kg/L. Kg/m^3. oz/in^3. oz/ft^3. oz/gal oz/gal lb/in^3. lb/ft^3. lb/gal lb/gal t/m^3