11111111
377
255
FF
How to Use
Enter Value
Select Units
See Conversion
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What Is Number Base Converter?
Number Base Converter is a free online tool that converts numbers between different numeral systems. Convert between binary, octal, decimal, hexadecimal, and any custom base instantly.
Key Features
Convert between all standard number bases. Support for custom bases from 2 to 36. Real-time conversion as you type. Handles large numbers with precision. Group digits for readability.
Benefits
Essential for programming and computer science work. Quickly verify binary and hex calculations. Understand how numbers are represented in different systems.
Use Cases
Convert memory addresses from hex to decimal. Verify binary calculations in programming. Convert octal file permissions in Unix systems. Understand color codes in hexadecimal.
Tips for Best Results
Learn common conversions: hex F is decimal 15, binary 1111. Use hex for compact representation of binary data. Remember that each hex digit represents exactly 4 binary digits.
Frequently Asked Questions
Convert between binary (base 2), octal (base 8), decimal (base 10), hexadecimal (base 16), and any custom base from 2 to 36.
Enter your decimal number and select binary as the target base. The tool instantly shows the binary representation. For example, decimal 42 is binary 101010.
Yes. Enter the hex value with or without the 0x prefix and get the decimal equivalent instantly. Hex FF equals decimal 255.
Yes. Negative numbers are handled correctly across all bases. The tool shows the appropriate representation for each number system.
Yes. The tool handles large integers accurately. For very large numbers, BigInt precision is used to avoid rounding errors.