Metrication

Metrication or metrification is conversion to the metric system of units of measurement.^[2] Worldwide, there has been a long process of independent conversions of countries from various local and traditional systems, beginning in France during the 1790s and spreading widely over the following two centuries, but the metric system has not been fully adopted in all countries and sectors.

An example of metrication in 1860 when Tuscany became part of modern Italy

Contents

• 1 Overview
• 2 Before the metric system
• 3 Forerunners of the metric system
• 4 Conversion process
  • 4.1 Chronology and status of conversion by country
• 5 Exceptions
  • 5.1 United Kingdom
  • 5.2 United States and Canada
  • 5.3 Air and sea transportation
• 6 Accidents and incidents
• 7 See also
• 8 References
• 9 External links