When showing a measurement, use the '''local system of units''' for the destination you're describing. This is the system that travellers will see on road signs, local maps, menus, food packages, weather reports, etc.
all of the world, this is the '''metric system''' . For the [[United States of America]], it's the '''"US standard"''' system of units'''—similar to, but certainly not the same as, the '''imperial''' system of the [[United Kingdom]]. In some cases, the systems are mixed—for example, in the UK, road distances are measured in miles and beer served by the pint, while meat and canned goods are measured in (kilo)grams. Milk is measured in both pints (in [[England]] and [[Wales]]) ''and'' litres ( in [[Scotland]]) . We favour accuracy over consistency.
The chief difference between the
U.S. system of units and the imperial system is in the sizes of the pint and the gallon. The US measures are 20% smaller than the imperial measures. That means you get more drunk on a British pint, and you get fewer miles to the gallon on American roads!
If the measurements span multiple countries, use metric.