Octal to Binary

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Convert octal numbers (base-8) to binary (base-2).

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About Octal to Binary

Paste one or more octal numbers (one per line) and instantly get their binary equivalents. Each octal digit maps to exactly 3 binary bits, making this a clean and direct conversion used in systems programming.

How to use

  1. Enter one octal number per line in the input panel.
  2. The binary equivalent appears instantly in the output panel.
  3. Click Copy to copy the results to your clipboard.

More Number / Base Conversion

Octal to Decimal

Convert octal numbers (base-8) to decimal (base-10).

Hex to Binary

Convert hexadecimal numbers (base-16) to binary (base-2).

Binary to Decimal

Convert binary numbers (base-2) to decimal (base-10).

Frequently Asked Questions

FAQs about Octal to Binary

Why does each octal digit map to 3 binary bits?

Because octal is base-8 = 2^3. Values 0–7 can each be represented by exactly 3 binary digits: 0=000, 1=001, ..., 7=111.

What is octal 7 in binary?

Octal 7 = binary 111. This is the maximum single octal digit (decimal 7).

What is octal 377 in binary?

Octal 377 = binary 11111111 — the maximum byte value (decimal 255).

Can I convert multiple numbers at once?

Yes. Enter one octal number per line and the tool will convert each one individually.

What digits are valid in octal?

Only digits 0–7 are valid in octal. If an invalid digit is entered, the tool will show an error for that line.