TXT · Text & Data tools

Binary to Octal Converter

Input

Output (Octal)

Go To Full Number Base Converter

Converting binary to octal

Paste your base 2 binary integers into the input pane. The converter processes the values instantly and outputs the base 8 octal equivalents. It supports both positive and negative values using standard plus or minus signs. Output format omits the 0o prefix by default.

Allowed characters and prefixes

Binary input may contain only 0 and 1. You can safely include standard 0b prefixes, as the tool strips them automatically before processing. Spaces and underscores are also ignored, allowing you to format long binary strings for readability.

Batch processing

This variant runs in batch mode by default. Paste multiple binary values using one number per line, and the tool returns a matching list of octal results. If a line contains invalid characters, an error message appears inline without interrupting the rest of the batch.

Frequently Asked Questions

Does this support negative binary numbers?

Yes. Use a leading minus sign (−) or plus sign (+). The sign is preserved in the octal output.

Can I convert multiple binary values at once?

Yes. This variant runs in batch mode by default: paste one binary integer per line and get one octal result per line.

Can I paste values with a 0b prefix?

Yes. Inputs like 0b101010 are accepted in this variant.

Does it accept spaces or underscores in binary?

Yes. Spaces and underscores are ignored, so values like 1010_1100 or 0b1111 0000 work.

Why convert binary to octal?

Octal groups bits in sets of 3, which can be a compact way to read large binary values (and it’s used in Unix-style permissions).

Try one of our format-specific converters below

Full Number Base Converter tool

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007Hex to Decimal Converter

008Hex to Octal Converter

009Octal to Binary Converter

010Octal to Decimal Converter

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