Comment Re:Socialist pig! (Score 1) 725
The US customary units differ from the imperial units anyway. Imperial gallon is 4.54 L (based on volume of 10 pounds of water), US gallon is 3.785 L (defined as 231 cubic inches). Even the ratios of fl oz to cups and pints is different. 1 imperial pint = 2 Imp. cups = 20 Imp. fl oz ~= 568 mL, 1 US pint = 2 US cups = 16 US fl oz ~= 473 mL.
The FDA also already defines metricated units for use on food labelling, so that on nutrition labels where fl oz are stated, that really means 30 mL exactly, and similarly for teaspoon (5 mL) and tablespoon (15 mL).
Although the international inch, foot, yard and mile are all the same in every day usage, the US also has the special survey foot and mile.