Octal Converter
Convert between octal, decimal, binary, and hexadecimal simultaneously. All four number systems update in real-time. 100% client-side.
Octal (Base 8)
Decimal (Base 10)
Binary (Base 2)
Hexadecimal (Base 16)
Common Values Reference
| Decimal | Octal | Binary | Hex | Note |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | Zero |
| 7 | 7 | 111 | 7 | Max single octal digit |
| 8 | 10 | 1000 | 8 | First two-digit octal |
| 10 | 12 | 1010 | A | Ten |
| 16 | 20 | 10000 | 10 | First two-digit hex |
| 64 | 100 | 1000000 | 40 | First three-digit octal |
| 255 | 377 | 11111111 | FF | Max byte (8 bits) |
| 511 | 777 | 111111111 | 1FF | chmod 777 |
| 4096 | 10000 | 1000000000000 | 1000 | 4 KB |
About Number Base Conversion
Octal (base-8) uses digits 0-7 and is commonly used in Unix file permissions (chmod). This tool converts between all four major number systems simultaneously.
Features
- Real-time simultaneous conversion across all four bases
- Type in any field and all others update instantly
- Support for arbitrarily large numbers via BigInt
- One-click copy for each format
- 100% client-side -- no data sent to any server
Disclaimer:This tool is provided “as is” for informational and educational purposes only. Results may not be 100% accurate. ToolBird makes no warranties, express or implied, regarding the accuracy, reliability, or completeness of any output generated by this tool. This tool does not constitute professional, legal, financial, medical, or tax advice. Always consult a qualified professional for important decisions. By using this tool, you agree that ToolBird and its operators shall not be held liable for any damages, losses, or consequences arising from the use of this tool or reliance on its results. All processing occurs in your browser — we do not store, transmit, or access your data. Use at your own risk.