Number Base Converter
Convert numbers between binary, octal, decimal, hex and any base 2–36.
Binary (base 2)
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Octal (base 8)
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Decimal (base 10)
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Hexadecimal (base 16)
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AHow to use
- 01 Type a number and choose its base — or let the tool detect it.
- 02 Get the binary, octal, decimal and hexadecimal forms at once.
- 03 Copy whichever result you need.
QFAQ
How big can the numbers be? ＋
Integer conversion uses arbitrary-precision arithmetic, so values far beyond 64-bit convert exactly. Fractional digits are computed to 12 places.
What does base 36 mean? ＋
Digits are 0–9 plus A–Z — the highest radix common tools accept. Input case doesn't matter.