Question: What Units Is the Metric System Based On?
The metric system is a decimal-based system of measurement originally based on the meter and kilogram, which were introduced by France in 1799. Decimal-based means all the units are based on powers of 10. In order to convert between units, it's only necessary to multiply or divide by powers of 10. For example, 1 meter is 100 centimeters (multiply by 102
or 100). 1000 milliliters is 1 liter (divide by 103
More About the Metric System
Overview of Metric UnitsTable of Derived Metric UnitsMetric Unit Prefixes