The Moon is Metric
It is time for America to bite the bullet.
All work done on the Moon will be done in under System International (SI), also know as the Metric System. The SI term is more proper.
All design work will be done directly in SI and will not be done under other systems and then converted to SI. Such conversions are sometimes called soft metric and are unacceptable.
SI Converter for You
Here is an Excel spreadsheet that does American to SI conversions: