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Base Converter
FreeType a number in binary, octal, decimal or hexadecimal and see it in all four bases at once, with a copy button on each result.
Free & unlimited
Select input base
Results
Binary
10000
Octal
20
Decimal
16
Hexadecimal
10
How it works
- • Binary (base 2) uses only 0 and 1 — how computers count.
- • Octal (base 8) uses 0–7, decimal (base 10) uses 0–9.
- • Hexadecimal (base 16) uses 0–9 and A–F — common in colors and code.
- • Example: binary 10000 = octal 20 = decimal 16 = hex 10.
Calculated instantly in your browser — nothing is sent to a server.