This calculator was created for those who asked to convert decimal number to uncommon positional numeral systems, for example, with base of 3, 5, 7, 12.
To get result, you should enter decimal number and target numeral system base, i.e. 16.
For systems with base greater than 10 I traditionally use english alphabeth letters for denoting digits. Thus, 10 = A, 11 = B, 12 = C, and so on.