Symbols for pound per cubic foot or per cubic inch, traditional engineering units of density. 1 pcf = 16.018 46 kg/m3 and 1 pci = 1728 pcf = 27 679.90 kg/m3
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}