This page allows you to convert to and from the D'ni number system used in the Myst series of games. The D'ni number system is a base-25 number system. This means that it has separate symbols for the numbers 0 through 24 (a symbol for 25 also exists but it is a special case), and each digit in a number represents a power of 25.
Enter a decimal number in the input box to convert it to a D'ni number, or use the buttons to enter a D'ni number directly.