Throughout history, humankind has created different units for Measuring Area and Volume. Units of measurement most commonly used today are those within the International System of Units, such as squared meters and liters. The United States uses its own customary units such as square miles or gallons to measure area and volume. In our Measuring Area and Volume topic, you will learn about Volume Conversion and practice a variety of unit conversions, including Converting Between Square Inches and Centimeters. You will also discover how to measure three-dimensional space in Metric Units of Volume and English Units of Volume.