Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. See all four bases at once when you type a number in any format. Includes hex color reference.
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How to Use This Tool
- Select the input number base (binary, octal, decimal, or hexadecimal).
- Enter your number in the input field.
- View the number converted to all other bases instantly.
- Use the tool for programming, networking, or computer science studies.
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Frequently Asked Questions
What are number bases?
Number bases are different systems for representing numbers. Binary (base 2) uses digits 0-1, octal (base 8) uses 0-7, decimal (base 10) uses 0-9, and hexadecimal (base 16) uses 0-9 and A-F.
Why do I need to convert between number bases?
Number base conversion is essential in computer science and programming. Binary is used for low-level operations, hexadecimal for memory addresses and colors, and decimal for everyday calculations.
Can I enter negative numbers?
Yes. You can enter negative numbers in any base, and the tool will convert them correctly to all other bases.
What's the maximum number size?
The tool can handle very large numbers — up to the safe integer limit of JavaScript (approximately 9 × 10^15). This is sufficient for most programming and educational use cases.
What number bases does this converter support?
Our converter supports binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Enter a number in any base and instantly see the equivalent in all other bases.