MetricMaster

[Info-Mac]

Download: http://archive.info-mac.org/sci/metric-master.hqx

MetricMaster is a measurement unit conversion calculator containing 2,000
metric/S.I., imperial, U.S., and other units in its database, most to 14
significant digit precision. New units can be added and unwanted ones
removed. Supports ft/in/fractions, different number formats including
scientific notation, and complete control of significant digits.
MetricMaster can also convert currencies, clock times, and many physical
constants. On-line info is available on the history and development of
modern measurement systems. 600 of the units have full definitions. For OS
8, 9, and X.