Number Base Converter (Binary, Decimal, Hex, Octal)
Convert any number between decimal, binary, octal, and hexadecimal instantly. Perfect for students, developers, and engineers.
Enter a number to convert
How to Use
- 1
Select the base of your input number (decimal, binary, octal, or hex)
- 2
Type your number in the input field
- 3
All four representations appear instantly below
Frequently Asked Questions
What bases does this support?
Decimal (base 10), Binary (base 2), Octal (base 8), and Hexadecimal (base 16).
Are negative numbers supported?
Currently only non-negative integers are supported.
What is hexadecimal used for?
Hexadecimal is widely used in programming, web colors, and computer memory addresses.
Is this free?
Yes, completely free and no signup required.
Convert between number bases
A number base converter translates a value between binary, decimal, octal and hexadecimal. Instead of doing the maths by hand, you enter a number in one base and read it in the others instantly.
It is an everyday helper for anyone learning or working with how computers represent numbers.
Who uses it
- Programmers and students converting binary, hex and decimal.
- Reading colour codes, memory addresses or bitmasks.
- Computer science homework and quick sanity checks.
- Working with encoded data instead? See the Base64 encoder.
Your numbers stay local
Conversions happen in your browser, so they are immediate and your data never leaves your device.