Number Base Converter
Free online number base converter. Convert between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) instantly. Supports negative numbers and custom bases.
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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Enter a number to convert
How to Use
Enter a number
Type any integer in the input field. You can enter binary, octal, decimal, or hexadecimal values.
Select the input base
Choose the base of the number you entered (2, 8, 10, or 16).
See all conversions
The equivalent values in all other bases appear instantly below.
Copy a result
Click the copy button next to any result to copy it to your clipboard.