What number bases are supported?

Convert between binary (base 2), octal (base 8), decimal (base 10), hexadecimal (base 16), and any custom base from 2 to 36.

How do I convert decimal to binary?

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.

Can I convert hexadecimal to decimal?

Yes. Enter the hex value with or without the 0x prefix and get the decimal equivalent instantly. Hex FF equals decimal 255.

Does it support negative numbers?

Yes. Negative numbers are handled correctly across all bases. The tool shows the appropriate representation for each number system.

Can I convert large numbers?

Yes. The tool handles large integers accurately. For very large numbers, BigInt precision is used to avoid rounding errors.

Tools Converter ToolsNumber Base Converter

Number Base Converter

Convert between decimal, binary, hex, octal

Number

Input Base

Binary:
11111111

Octal:
377

Decimal:
255

Hex:
FF

How to Use

Step 1

Enter Value

Type the value you want to convert in the input field

Step 2

Select Units

Choose the source and target units for your conversion

Step 3

See Conversion

The converted result appears instantly as you type

Step 4

Copy Result

Copy the converted value to use it in your work

Share this tool

Learn More

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.