The difference is the tranguillary measurements of the two said units
The customary units are ones we use everyday. metric units usually have the word meter on it. my teacher taught me meter metric no meter no metric.
A Customary Unit or non-SI unit is a measurement unit that is not part of the metric system. Customary units are mainly units of the Imperial system but they could be localised customary units - such as Gaj (for area) is South Asia.
Degrees Fahrenheit.
United States customary units are a system of measurements commonly used in the United States.
metric
17.42 meters into customary units
The Imperial system of measurements, originally used in England.
The concept of precision is applicable to ANY system of units.
US customary units
square feet
The United States customary system (also called American system or, sometimes, "English units") is the most commonly used system of measurement in the United States.
Customary System was developed from English units and later modified in the United States. These are the common measurements used in the US after America declared its independence.