1 kilogram per cubic metre (kg/m3) = 0.001 grams per cubic centimetre (g/cm3) = 0.0624 pounds per cubic foot (lb/ft3)
1 pound per cubic foot (lb/ft3) = 16.02 kilograms per cubic metre (kg/m3)
1 pound per cubic inch (lb/in3) = 27679.9 kilograms per cubic metre (kg/m3)
1 pound/cubic US gallon (lb/gal3) = 119.826 kg/m3 (kg/m3)
1 lb/cubic English gallon (lb/gal3) = 99.776 kg/m3 (kg/m3)
1 lb/cubic (oil) barrel (lb/bbl3) = 2.853 kg/m3 (kg/m3)
1 Boehm density (B) = specific gravity at 140/15.5°C - 130
API degree = 141.5/specific gravity at 15.5°C - 131.5