Number / Base Converter

Regular JavaScript numbers lose precision above 2^53. Using BigInt throughout means arbitrarily large integers — including full 64-bit values — convert and compute exactly, with no silent rounding.

It means the value you entered doesn't fit in that bit width's range, so it was reduced modulo 2^n (two's complement wraparound) to show what the bit pattern would actually be — the same behavior as fixed-width integer overflow in languages like C, Java, or Go.

KB (kilobyte, SI) is 1000 bytes. KiB (kibibyte, IEC) is 1024 bytes. Operating systems and RAM specs often use binary (1024-based) counting even when labeled 'KB' or 'MB', which is why the two systems are shown side by side here.