lbf/in³

pound-force per cubic inch

Unit weightexact by definition

The pound-force per cubic inch is exactly 271,447.1375... N/m³. It is the unit weight form of the density figures every US mechanical engineer carries: steel at 0.284 lbf/in³, aluminium at 0.098, and it is the number that turns a machined volume directly into a weight.

1 lbf/in³ 271.44714 kN/m³