Number Base Converter
Convert between decimal, binary, octal, hexadecimal and base 36 — any size.
How to use the Number Base Converter
Uses arbitrary-precision integers, so very large numbers convert exactly.
Formula
Value = Σ digitᵢ × baseⁱ
Worked example
55993 in hexadecimal is DAB9; in binary it's 1101101010111001.
Frequently asked questions
Why do programmers use hexadecimal?
Each hex digit maps to exactly 4 binary bits, making binary data compact and readable.
Results are estimates for educational and planning purposes. Always confirm important financial, health or legal decisions with a qualified professional. Last reviewed 2026-09-27.