It is metric not customary because the usa doesnt use it
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Doesn't it? Oh yes it is. Almost all of the rest of world does, I'll have you know!
And so do American engineers and scientists, especially when engaged in international projects.
A "gran" is a German measurement, it is neither customary or metric. A "gram" is a metric unit.
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).
Ounces are an imperial unit. They are a bit confusing as they can be a volume unit or a mass unit. The metric equivalent would be gram or millilitre. About 30 gram = 1 oz About 30 mL = 1 fluid oz
It is a customary unit.
The opposing systems are imperial and metric, not customary. But, meters are metric.
The pound is NOT a metric unit.
It is customary.
Ounces are an imperial unit. They are a bit confusing as they can be a volume unit or a mass unit. The metric equivalent would be gram or millilitre. About 30 gram = 1 oz About 30 mL = 1 fluid oz
Metric.
Metric
Metric.
customary