Number base converter
Convert between decimal, binary, octal and hexadecimal.
Convert the base.
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Number base converter: what it is for
The number base converter turns any number between base 2 (binary), 8 (octal), 10 (decimal) and 16 (hexadecimal), and also base 36.
It is a handy aid for computer science, electronics and programming classes.
How to use
- Type the number.
- Choose the source base.
- See the result in every base.
When to use it
- Studying number systems.
- Converting colors and addresses in hexadecimal.
- Checking homework.
Frequently asked questions
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.