Base Converter

Convert numbers between any bases from 2 to 36 instantly. Supports binary, decimal, hex, octal, and custom bases.

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About This Tool

This Online Base Converter allows you to convert numbers between any numeral system bases from 2 (binary) to 36. Simply enter your number, select the input base (e.g., 10 for decimal, 2 for binary, 16 for hexadecimal), choose the output base you want to convert to, and get instant results. The tool includes full validation to ensure your input is valid for the selected base, with clear error messages if invalid characters are detected. Perfect for programmers, students, and anyone working with different number systems.

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How to Use

Enter the number you want to convert in the input field.
Select the current base of your number from the 'From Base' dropdown (e.g., choose 10 for decimal numbers).
Select the target base you want to convert to from the 'To Base' dropdown (e.g., choose 2 for binary).
Click the 'Convert' button to see the result instantly.
Use the 'Reset' button to clear all fields and start over.

Frequently Asked Questions

Find Quick Answers

What number bases does this tool support?

The tool supports any base from 2 to 36. This includes common bases like binary (2), octal (8), decimal (10), and hexadecimal (16), as well as less common bases up to 36.

How does the validation work?

The tool validates that each character in your input number is valid for the selected input base. For example, if you select base 10 (decimal), only digits 0-9 are allowed. If you select base 16 (hex), digits 0-9 and letters A-F are allowed. Invalid characters will trigger an error message.

Can I convert very large numbers?

Yes, the tool uses JavaScript's built-in number conversion functions which handle large numbers within JavaScript's safe integer range (up to 2^53 - 1). For extremely large numbers beyond this range, precision may be limited.

What characters are used for bases above 10?

For bases above 10, the tool uses the standard convention: digits 0-9, then letters A-Z (case-insensitive). For example, base 16 uses 0-9 and A-F, base 36 uses 0-9 and A-Z.

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