It isn't better. The customary might seem better because most Americans know the parts of the customary system they need to know and therefore it seems easy to use. 99 per cent of the world's population can't be wrong in using the modern metric system as an everyday measurement system.
1. It is the international standard, 2. It simplifies calculations, due to the decimal prefixes.
The Metric System is not necessarily better than the Imperial system. The Metric system merely uses base 10, which many (younger) people find easier than the Imperial's more erratic bases.
Metric.
It is a customary unit.
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It's both.
In many European countries the metric system IS the customary system!
It can be more or less. An once (customary) is bigger than a gram (metric) but a pound (customary) is smaller than a kilogram (metric).
It is a customary unit.
The opposing systems are imperial and metric, not customary. But, meters are metric.
Depends on if by 'customary' you're referring to a short ton or a long ton. A short ton is less than a metric ton; a long ton is more than a metric ton.
The pound is NOT a metric unit.
It is customary.
Metric.
Metric
Metric.
A "gran" is a German measurement, it is neither customary or metric. A "gram" is a metric unit.
customary
It is a customary unit.