Number Base Converter
Type a number in any base — see it in all others instantly.
Input
Results
Decimal (Base 10)
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Click to copy
Binary (Base 2)
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Click to copy
Hexadecimal (Base 16)
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Click to copy
Octal (Base 8)
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Click to copy
What do the bases mean?
Decimal (10) — everyday numbers using digits 0–9.
Binary (2) — how computers store data: only 0 and 1.
Hexadecimal (16) — compact notation used in programming; digits 0–9 and letters A–F.
Octal (8) — base-8 system using digits 0–7, common in Unix permissions.