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Ratiocinator is a simple pocket calculator that uses Roman numerals. A summary of writing rules is included.

What's New

Version 2.2.0:
  • Universal Binary, fully compatible with MacOS 10.2 to 10.5, both languages in one application.


Mac OS X 10.2 or later

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Ratiocinator User Discussion

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baby bloc Member IconReview+7
baby bloc

Great stuff! Only problem is I had to look it up here to remember the name to find it on my HD. Now I've added an abbreviation ("Roman") so Quicksilver can find it.

I hate when they date movies in Roman Numerals. When else do I need that? Now I can fight back with the tools of the oppressor!

Nice job.

Reply0 replies
Version 2.1
Anonymous Member IconReview

This is a great little program. It helped me brush up on my roman numerals!!!

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Version 2.0.2
There are no Ratings for this App yet.
> 5 2


Current Version (2.x)


Downloads 3,290
Version Downloads 153
License Free
Date 15 Aug 2008
Platform OS X / PPC 32 / Intel 32
Price Free
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