Convert between binary, octal, decimal, and hexadecimal number systems instantly
| Decimal | Binary | Octal | Hexadecimal |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 1 |
| 8 | 1000 | 10 | 8 |
| 10 | 1010 | 12 | A |
| 16 | 10000 | 20 | 10 |
| 32 | 100000 | 40 | 20 |
| 64 | 1000000 | 100 | 40 |
| 128 | 10000000 | 200 | 80 |
| 255 | 11111111 | 377 | FF |
| 256 | 100000000 | 400 | 100 |
| 1024 | 10000000000 | 2000 | 400 |
| 65535 | 1111111111111111 | 177777 | FFFF |
Enterprise-grade number base conversion tools for developers and engineers
Convert simultaneously between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16)
All number representations update in real-time as you type in any field — instant bidirectional conversion
Handle arbitrarily large numbers using BigInt for precise conversion beyond 64-bit limits
Client-side calculations ensure zero-latency conversion with no server communication required
All conversions happen locally in your browser — no data is ever sent to external servers
Built-in common conversions reference table for quick lookup of frequently used values
Everything you need to know about number base conversion
This tool supports the four most commonly used number bases: Binary (base 2, digits 0-1), Octal (base 8, digits 0-7), Decimal (base 10, digits 0-9), and Hexadecimal (base 16, digits 0-9 and A-F).
This tool uses JavaScript BigInt for conversions, which supports arbitrarily large integers. There is no practical limit on the size of numbers you can convert, far exceeding standard 64-bit limits.
Yes! All number conversions happen entirely in your browser using client-side JavaScript. No data is transmitted to any server. Your data remains completely private.
The bit length indicator shows the minimum standard bit width needed to represent the current number: 8-bit (0-255), 16-bit (0-65535), 32-bit, or 64-bit. This is useful for understanding data types in programming.
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