Number Base Converter Online - Free number base converter for binary, octal, decimal, and hex.
Free online number base converter. Instantly convert between binary, octal, decimal, and hexadecimal. Supports large numbers using BigInt.
Enter a number and select its base to see conversions.
How to Use Number Base Converter
- 1Enter a number in any base.
- 2Select the source base (2, 8, 10, or 16).
- 3Click "Convert" to see all base representations.
Frequently Asked Questions
What is a number base?
A number base (or radix) is the number of unique digits used to represent numbers. Base 10 (decimal) uses 0-9, base 2 (binary) uses 0-1, base 8 (octal) uses 0-7, and base 16 (hexadecimal) uses 0-9 and A-F.
Does this tool support large numbers?
Yes. This converter uses JavaScript BigInt internally, so it handles numbers far beyond the safe integer limit of 2^53-1.
What are the common prefixes for number bases?
Binary uses 0b (0b1010), octal uses 0o (0o12), and hexadecimal uses 0x (0xA). Decimal numbers have no prefix.
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