Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases in real time. All processing happens in your browser.
Input Base
Conversions
Binary
Enter a valid numberOctal
Enter a valid numberHexadecimal
Enter a valid numberAbout Number Bases
Binary (Base 2) — Uses digits 0 and 1. Fundamental to digital electronics and computing.
Octal (Base 8) — Uses digits 0–7. Historically used in Unix file permissions.
Decimal (Base 10) — Uses digits 0–9. The standard number system used by humans.
Hexadecimal (Base 16) — Uses digits 0–9 and a–f. Commonly used in programming for memory addresses, color codes, and hash representations.