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Number Base Converter
Convert between number bases.
Binary, octal, decimal, and hexadecimal — convert instantly between any of them.
4 Bases at Once
See binary, octal, decimal, and hex all together.
Instant Conversion
Enter a number and get results immediately.
Free & Unlimited
No signup, no watermarks, no usage limits.
What is a Number Base Converter?
A number base converter translates a number from one numeral system to another. Common bases used in programming and computing are binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).
How to use this converter
- Enter your number.
- Select which base that number is currently in.
- Click Convert to see it in all four bases.
Frequently Asked Questions
Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Enter a number in any of these and see it converted to all the others at once.
This tool works with whole non-negative integers only.
Yes. 100% free — no account required, no usage limits.