Conversions

Instant, private, and free

Binary to Octal Converter.

Convert binary numbers to octal.

On-device calculationNo signup
01

Set your values

Results update as you type.

Result: 1

Result

1

Use Cases

Programming and Debugging

Quickly convert binary values to octal for easier reading of bit patterns in low-level programming or when working with file permissions in Unix-like systems.

Example: Convert binary 111111 to octal 77.

Educational Practice

Students learning number systems can verify their manual conversions between binary and octal, reinforcing understanding of base conversion.

Example: Check that binary 101101 equals octal 55.

Frequently Asked Questions

How do I convert binary to octal using this calculator?
Select 'BINARY' in the 'Convert from' dropdown and 'OCTAL' in the 'Convert to' dropdown. Enter your binary number (e.g., 101010) and the octal equivalent will be displayed.
Can I convert from octal to binary with this tool?
Yes, you can. Simply choose 'OCTAL' as the 'Convert from' and 'BINARY' as the 'Convert to'. Enter the octal number and the binary result will be shown.
Does this converter support decimal and hexadecimal inputs?
Yes, the 'Convert from' and 'Convert to' dropdowns include options for BINARY, OCTAL, DECIMAL, and HEXADECIMAL, allowing conversions between any of these bases.

Tips & Common Mistakes

Tips

  • Ensure the input number contains only digits valid for the selected 'Convert from' base (e.g., binary only 0s and 1s).
  • For binary to octal conversion, group binary digits in sets of three from the right; each group maps to a single octal digit.
  • If you need to convert a decimal or hexadecimal number to octal, select the appropriate 'Convert from' base first.
  • Double-check your input for leading zeros; they are allowed but do not affect the result.

Common Mistakes to Avoid

  • Entering a number with digits not allowed in the selected base (e.g., using '2' in binary).
  • Forgetting to change the 'Convert to' dropdown, resulting in an unexpected output base.
  • Misinterpreting the result when converting from a non-binary base; ensure you read the output in the correct base.

Last updated: August 13, 2026