Duodecimal Converter

This duodecimal converter turns a decimal whole number into its duodecimal, or base 12, equivalent, a system also known as dozenal. Base 12 rarely gets used for everyday counting, but it interests mathematicians and dozenal enthusiasts for a practical reason: twelve divides evenly by two, three, four and six, so fractions like a half, a third and a quarter come out as tidy whole digits, unlike in base ten, where a third becomes a recurring decimal. Traces of base 12 show up in 12-hour clocks, dozens of eggs, and twelve inches to a foot. To use the calculator, type a decimal whole number into the input box. As you type, the tool returns three results: the number written in duodecimal using the digits 0 to 9 followed by A for ten and B for eleven, the same number written in binary for comparison, and your decimal value grouped with thousands separators so you can confirm the entry. The method is repeated long division: the number is divided by 12 over and over, each remainder recorded as a digit, and those digits read in reverse to build the final figure. This is exact arithmetic, not an estimate, so the result is precise for any whole number entered, whether you are exploring number systems, working on a dozenal project, or simply curious what a familiar number looks like in base 12.

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