MetricMaster - Version 2.0 MetricMaster is a measurements unit conversions calculator containing hundreds of metric, imperial, and U.S. units in its database, most of them precise to 14 digits. New units can be added. Converts ft/in/fractions, currencies, and many physical constants. Extensive on-line info on the history and development of measurement systems. ConvertUnits Pro 'Lite' is the shareware version with an initial 25 conversions with access to the full database. After this, a reduced data set will remain operational.