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.
using classical rather than metric units of measurement
It is a customary unit.
In the SI system (metric), length is a meter, mass is the kilogram, and time is the second.
The pound is NOT a metric unit.
metric
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.
Tape measure
You use conversion factors.
Units like inches, feet, pounds, and gallons are customary units, commonly used in the United States. Units like meters, grams, liters, and Celsius are metric units, widely used internationally and in the scientific community.
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.
The concept of precision is applicable to ANY system of units.
Some similarities of the metric and customary systems
Capacity can be measured using both the metric system and customary units. In the metric system, capacity is typically measured in liters or milliliters, while in the customary system, it is measured in ounces, cups, pints, quarts, and gallons.
using classical rather than metric units of measurement
It is a customary unit.
There are thousands of measurement units in both systems and it is not possible to list them all.