Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases.
5 of 5 uses remaining today
Binarybase 2
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Octalbase 8
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Decimalbase 10
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Hexadecimalbase 16
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Frequently Asked Questions
What number bases are supported?▾
Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Enter a value in any base and see the result in all other bases simultaneously.
How does the conversion work?▾
The tool parses the input in the selected base, converts it to a JavaScript number (decimal), then outputs it in all four bases. For hexadecimal output, letters are displayed in uppercase.
Is there a size limit for numbers?▾
The tool supports numbers up to JavaScript's safe integer limit (2^53 - 1). For very large numbers, results may lose precision.
Can I convert negative numbers?▾
Negative numbers are supported for decimal input. Binary, octal, and hex inputs are treated as unsigned.