List of conversions from US engineering units to SI units.
\[\begin{align} & 1\ \mathrm{pcf} = 1\ \mathrm{lb\ ft^{-3}} = 16.0184634\ \mathrm{kg\ m^{-3}} \\ & 1\ \mathrm{kcf} = 1000\ \mathrm{lb\ ft^{-3}} = 16018.4634\ \mathrm{kg\ m^{-3}} \\ & 1\ \mathrm{kip} = 1000\ \mathrm{lbf} = 4448.22\ \mathrm{N} \\ & 1\ \mathrm{ksi} = 1000\ \mathrm{lbf\ in^{-2}} = 6894757.28\ \mathrm{N\ m^{-2}} \end{align}\]