How to use: Convert numbers between different base systems (decimal, hexadecimal, binary). Select conversion Type: Decimal to Hex (base 10 to base 16), Hex to Decimal, or Binary to Hex (base 2 to base 16). Enter Input number in the appropriate format. Results show converted value. Decimal uses digits 0-9. Hex uses 0-9 and A-F (A=10, B=11...F=15). Binary uses only 0 and 1. Examples: Decimal 255 = Hex FF = Binary 11111111. Decimal 16 = Hex 10 = Binary 10000. Applications: computer programming (memory addresses, color codes #FFFFFF), networking (IP addresses), digital electronics, cryptography. Hex shorthand for binary (1 hex digit = 4 binary digits). Essential for computer science and IT.