Metric system
Metric units scale by powers of ten. Common examples include meter, kilometer, gram, kilogram, liter, square meter, and Celsius.
Measurement systems
Metric vs Imperial system
The metric system is decimal and based on SI units. Imperial and US customary units use historical relationships that are common in construction, travel, cooking, land, and trade.
Reserved placement between helpful content sections.
Imperial and US customary
Common units include inch, foot, yard, mile, ounce, pound, gallon, quart, pint, acre, and Fahrenheit. Some US and imperial liquid units differ.
Exact anchors
Many modern relationships are exact, including 1 inch = 0.0254 meters and 1 pound = 0.45359237 kilograms.