Relationship among meter, liter, and gram

• Metric Measurements
  Length: meter
  Capacity: liter
  Weight: gram 1 kg = 1,000 g

  These units are combined with certain prefixes:
  

  milli- means 1/1,000     centi- means   1/100     kilo- means 1,000
  Other metric units are used less frequently, but they should be mentioned:
  deci- means 1/10    deka- means 10    hecto- means 100
• Substitution Principle
  If two quantities are equal, then one may be substituted (replaced) by an equal quantity without changing the value of the expression.
• U.S. Measurement Conversions