Number base converter
Octal to Binary Converter
Convert octal numbers to binary for programming, computer science, and digital logic.
Base converter
Octal to Binary
Convert whole numbers between decimal, binary, hexadecimal, and octal.
Octal input can use only digits 0-7.
Result
1000
Octal (base 8) to Binary (base 2)
How Octal to Binary Conversion Works
Octal uses base 8, while Binary uses base 2. The converter first reads the input value in base 8, then writes the same whole number in base 2.
This tool supports whole numbers within JavaScript's safe integer range. Binary output is grouped in blocks of four digits so long results are easier to read.
Example Conversions
| Octal | Binary |
|---|---|
| 10 | 1000 |
| 17 | 1111 |
| 77 | 11 1111 |
| 377 | 1111 1111 |
FAQ
What does Octal to Binary Converter do?
It converts a whole number written in Octal (base 8) into Binary (base 2).
Is Octal to Binary conversion exact?
Yes. Number base conversion rewrites the same whole number in another base, so the value itself does not change.
Can I use spaces in binary or hex input?
Yes. Spaces are ignored, so grouped binary like 1010 1101 is accepted.
Is this converter private?
Yes. The conversion runs locally in your browser and does not need a database or paid API.