Terry, I think they just rounded it. I noticed they did the same thing for the cubic inch about half a page later. As far as I can tell, the U.S. gallon is exactly 231 cubic inches, which means you can calculate the exact conversion if necessary, based on the definition of the inch.
Carl -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Terry Simpson Sent: Tuesday, March 04, 2003 4:52 AM To: U.S. Metric Association Subject: [USMA:25020] RE: Definitions of US non-metric units FW: U.S. Customary Units I have been researching US non-metric definitions. Handbook 130 says a US gallon is 231 cubic inches. http://ts.nist.gov/ts/htdocs/230/235/h130-03/07_IV_PackLabReg.pdf Federal standard 376 says it is 3.785412 liters http://ts.nist.gov/ts/htdocs/200/202/fs376-b.pdf There is a small difference between the two values. Is the US gallon precisely defined in terms of cubic inches or liters? -- Terry Simpson Human Factors Consultant [EMAIL PROTECTED] www.connected-systems.com Phone: +44 7850 511794
