Yes they are.* * * * *No, they are not. A foot, for example, is a standard unit of the Imperial system.
It is the International Standard of units.
The idea is to use an international standard - the same units everywhere.
International standard of units
SI units
SI and metric are the same units.
The main idea is standardization. The idea is to use the same standard units all over the world.
The SI units are rationally defined, universal, based on a decimal system.
Standard units are used for measurmen as there is a system called the SI units and that is considered as the international system of units that is why we use standard units for measurment .
About 27 ozAnswer:In all but one country of the world SI units are the standard
SI Units
Si and metric are the same thing. SI was a redefinition of metric in 1960.