The octal calculator supports calculation and conversion of values in octal, binary, hexadecimal, and decimal systems. It provides basic arithmetic operations (addition, subtraction, multiplication, division) and bitwise operations (AND/OR/NOT/XOR/bit shift). It automatically displays results in binary, decimal, hexadecimal, and octal formats. When selecting the NOT operation, the second input field is automatically hidden. Clicking the example button generates a random example.