lb/in³

pound per cubic inch

Densityexact by definition

The pound per cubic inch is exactly 27,679.9047102... kilograms per cubic metre. It is the density unit of US metals practice: steel is 0.284 lb/in³, aluminium 0.098, and copper 0.323, and those three numbers are memorised by every mechanical engineer trained in customary units.

1 lb/in³ 27,679.905 kg/m³