Number Base Converter
Enter a number in any base (Binary, Octal, Decimal, or Hexadecimal) and instantly see its equivalent in all other bases. Supports large integers and shows step-by-step conversion. Perfect for CS students and embedded developers.
Binary (Base 2)
—Octal (Base 8)
—Decimal (Base 10)
—Hexadecimal (Base 16)
—Features
- Converts between Binary (Base 2), Octal (Base 8), Decimal (Base 10), and Hexadecimal (Base 16)
- All representations shown simultaneously
- Input from any base — enter in the format you know
- Supports large numbers
- Hex output in both uppercase and lowercase
- Click any result to copy it
Frequently Asked Questions
How do I convert decimal to binary?
Select Decimal as the input base and enter your number. The binary equivalent is shown instantly. For example, decimal 10 = binary 1010. You can also enter in binary and see all other representations simultaneously.
How do I convert hexadecimal to decimal?
Select Hexadecimal as the input base and type your hex value (e.g. FF). The decimal, binary, and octal equivalents appear instantly. For example, hex FF = decimal 255 = binary 11111111.
What is hexadecimal used for?
Hexadecimal (base 16, using digits 0–9 and A–F) is widely used in computing for memory addresses, color codes in web design (#FFFFFF for white), bytecodes, cryptographic hash outputs, and low-level programming. It is compact and easy to convert to binary.
What is binary used for?
Binary (base 2, using only 0 and 1) is the fundamental number system of all digital computers. Every piece of data stored or processed by a computer is ultimately represented in binary. It is also used in Boolean logic, bitwise operations, and networking (IP addresses in binary).