Density

kg/m3
lb/ft3
lb/UK gal
g/cm3
ton/yd3
lb/in3

Density at 60°F (kg/l) = Specific Gravity at 60°F x 0.999012

Degrees API = (141.5/G)-131.5

G = specific gravity (oil/water) at 60°F

Density of air (0°C, 1 atm) = 1.2928 g/l