The United States is the only first world country in the world that does not use the Metric System. Amongst all nations, Burma (Myanmar) and Liberia are the only other countries that do not use the Metric System.
In 1999, the Mars Climate Orbiter crashed in to Mars, wasting $327.6 million dollars because of American confusion over Metric and so-called "Standard" units.
When the BRITSH stop using the BRITISH Measurement System and switches to the Metric System, it is a sign that we should as well.
Each year, an estimated $16.2 billion dollars are wasted teaching non-metric units to students.
The cost of using non-metric units by US industry is estimated at 8%. This represents wasting $1.284 trillion dollars of GDP per year. Let me write that number out: $1,284,000,000,000!