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Number Base Converter

Custom:
Binary(base 2)
11111111
Octal(base 8)
377
Decimal(base 10)[input]
255
Hexadecimal(base 16)
FF
To base:
7V

Converting 255 (decimal) → base 32:

255 ÷ 32 = 7 remainder V

7 ÷ 32 = 0 remainder 7

Read remainders bottom to top: 7V

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About Number Base Converter

Number Base Converter translates numbers between binary, octal, decimal, hexadecimal, and any custom base from 2 to 36. It is an essential tool for software developers, computer science students, and hardware engineers who regularly work with different numeral systems. The converter handles integers of arbitrary length and displays results in all major bases simultaneously.

Key Features

  • Converts between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16)
  • Supports any custom base from 2 to 36 for specialized use cases
  • Displays conversions in all common bases simultaneously for quick comparison
  • Handles large integers beyond standard 32-bit and 64-bit limits
  • Groups binary and hex output into nibbles and bytes for readability
  • Shows step-by-step conversion breakdown for educational purposes

How to Use Number Base Converter

  1. 1

    Select the input base

    Choose the number base of your input value, such as binary, decimal, or hexadecimal.

  2. 2

    Enter your number

    Type the number you want to convert. Use digits 0-9 and letters A-F for bases above 10.

  3. 3

    View all conversions

    The tool instantly displays the equivalent value in binary, octal, decimal, and hexadecimal simultaneously.

  4. 4

    Copy the result you need

    Click the copy button next to any base output to grab just that conversion for your code, documentation, or calculations.

Common Use Cases

Low-Level Programming

Convert between hex and binary when working with bitwise operations, memory addresses, hardware registers, or network protocols in C, Rust, or assembly.

Web Development Color Codes

Translate hexadecimal color codes to decimal RGB values or binary representations when debugging CSS, canvas rendering, or image processing code.

Computer Science Education

Practice and verify base conversion homework problems by checking results across binary, octal, decimal, and hexadecimal systems.

Network and Security Engineering

Convert IP addresses, subnet masks, and MAC addresses between decimal, hexadecimal, and binary formats for network configuration and packet analysis.

Why Use Our Number Base Converter

See conversions across binary, octal, decimal, and hexadecimal simultaneously instead of converting one pair at a time. This tool supports arbitrary-precision integers that go far beyond 64-bit limits, which most calculator apps cannot handle. The grouped binary and hex output with nibble spacing makes it easier to read register values and memory addresses than any built-in OS calculator.

Offline-Ready Number Crunching

All base conversions are computed locally in your browser with no external requests. Memory addresses, register values, and hardware identifiers you convert are never logged or transmitted. Work with sensitive low-level debugging data and network addresses without any information leaving your machine.

Frequently Asked Questions

What is the maximum number size supported?
The converter uses arbitrary-precision arithmetic, so there is no fixed maximum size. It can handle numbers with hundreds of digits, far beyond the limits of 32-bit or 64-bit integer types.
Can I convert to bases other than 2, 8, 10, and 16?
Yes. You can select any base from 2 to 36. Bases above 10 use letters A through Z to represent digit values 10 through 35, following standard mathematical conventions.
Does it support negative numbers?
The converter handles negative numbers by preserving the sign and converting the absolute value. For two's complement representation commonly used in computing, enter the unsigned binary value directly.

Last updated: April 6, 2026