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Dozenal Society of America
Promoting base twelve and alternative base mathematics
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The Dozenal Society of America
The DSA is a voluntary, nonprofit education corporation, organized for the conduct of research and education of the public in the use of dozenal (also called duodecimal or base-twelve) in calculations, mathematics, weights and measures, and other branches of pure and applied science.

DozenCalc: A Doznal Calculator App for Android

Name: Dozencalc
Type: utility
Summary: A full-featured dozenal calculator, with both basic and scientific modes.
Author: Donald Goodman
Nature: Download

A dozenal (duodecimal, or base-twelve) calculator with both simple and scientific modes. Simple mode (automatically chosen when in portrait orientation) contains the four functions, square roots, exponents, and parentheses for grouping, and operates to four digits of fractional accuracy. Scientific mode (automatically chosen when in landscape orientation) has all of the same features, plus trigonometric functions and their inverses, logarithms, reciprocals, buttons for pi and the base of the natural logarithm, and variable precision allowing the user to select the number of fractional digits desired.