Unit Converters / Number Base Converter
Number Base Converter
Convert numbers between binary, decimal, octal, and hexadecimal.
Features
- Binary, octal, decimal, hexadecimal
- Clear error for invalid input
- Instant results
- Free, unlimited use
How to Use
Step 1
Enter a number.
Step 2
Choose the base it's currently in and your target base.
Step 3
Click Convert to see the result.
About This Tool
Number Base Converter instantly converts a number between binary, octal, decimal, and hexadecimal, useful for programming, computer science, and digital electronics.
How it works: each digit's value is multiplied by the base raised to its position, then summed — e.g. in base 10, present the number as an existing decimal, then that decimal value is re-expressed in the target base.
Frequently Asked Questions
What happens if I enter an invalid digit for the base?
The tool shows a clear error instead of an incorrect result.
Does it support negative numbers?
The current version is designed for positive whole numbers.