Hex to Decimal Expansion

This hex to decimal converter expands each hex digit as a power of 16 — 1A3F = 1×16³ + A×16² + 3×16 + F — and reports the result in decimal, binary, and octal simultaneously. The arithmetic uses arbitrary precision, so even hundreds of hex digits convert exactly.

The 4-Bit Mapping

Because 16 = 2⁴, every hex digit is exactly four bits. 0x1A3F reads as binary 0001 1010 0011 1111, which is why hex is the standard notation for firmware dumps, color values, and memory addresses.

Byte and Word Views

For values up to two bytes, the calculator splits the high and low bytes and shows the signed 16-bit interpretation — useful when checking endianness, struct layouts, or protocol fields.