It's a Reverse Polish Notation calculator which does all arithmetic with the numbers and the units. Many mistakes will be caught immediately when the units in your answer are not what you expect; other mistakes will be avoided entirely, since you never need to shift decimal places (for example, when dividing m^2 by mm*cm). Moreover, UnitCalc is fully configurable -- you define what units you like to use. It will even do American units, if that's what you prefer.
UnitCalc has been superceded by MacUnitCalc (for Mac) and the author does not develop UnitCalc anymore.

Current Version:   ??

License Type:   Free

Home Site:

Source Code Availability:   Yes

Available Binary Packages:

  • Debian Package:   No
  • RedHat RPM Package:   No
  • Other Packages:   No

Targeted Platforms:

UnitCalc is written in mostly-ANSI-compliant C++, and uses a console-based interface for maximum portability. A compiled app for the Mac is readily available; Unix users should be able to compile it just fine with g++.

Software/Hardware Requirements:

g++ Compiler

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Mailing Lists/USENET News Groups:


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