Colorado State University
Usma: Commonly Used Metric System Units and Symbols
USMA provides a listing of commonly used metric system units, symbols, and prefixes.
Math Is Fun
Math Is Fun: Metric Area
The relationships between metric units of area are explained, with examples of how to calculate area.
Cool Fire Technology
Customary & Metric Systems of Measurement Area Measure
Scroll down to the bottom of the page to view a table which lists measurement conversions for area.