Binary to Octal Converter

Quickly convert binary numbers to octal numbers, supporting single and batch conversion, with three-bit grouping and reverse conversion features.

Bug report

Browser execution mode: Your data is processed in your browser and is not uploaded to the server.

Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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Tool Usage

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Binary Input

Only 0 and 1 allowed; spaces supported

Quick Actions

Batch Process

Convert multiple binary numbers, one per line

Octal Output

Conversion Details

Input length: 0bits

Valid bits: 0bits

Octal digits: 0bits

Groups: 0groups

Conversion Examples

Basic example: 101 → 5, 111 → 7

3-bit groups: 000 → 0, 001 → 1, 010 → 2

Compound example: 101110 → 56, 1010111 → 127

Special values: 0 → 0, 1 → 1

Binary to Octal Basics

Conversion rules:Each 3 binary digits equals 1 octal digit

Grouping method:Group every 3 digits from right to left

Zero padding:Pad with 0 on the left if fewer than 3 digits

Reference table: 000→0, 001→1, 010→2, 011→3, 100→4, 101→5, 110→6, 111→7

Tips

Input requirements:Only 0 and 1 are allowed; spaces can be used as separators

Batch processing:Enable batch mode to convert multiple binary numbers at once

3-digit groups:Use "3-digit groups" to view the conversion process

Instructions

Software Usage Instructions

Basic Operations:

Enter the binary number to convert in the "Binary Input" box (can only contain 0 and 1)
Click the "Convert" button, or simply enter input to convert automatically
The conversion result will be displayed in the "Octal Output" box
Click "Copy Result" to copy the conversion result to the clipboard

Batch Conversion:

Click the "Batch Mode" button to switch to batch conversion mode
Enter one binary number per line
The system will automatically convert all entered numbers
Results are displayed in the format "Original Number → Conversion Result"

Quick Actions:

Remove Spaces: Delete all spaces from the input
Add Spaces: Add a space every 8 bits for easier reading
Group by Three: Add a space every 3 bits to make the conversion process easier to view
Reverse Bit Order: Reverse the bit order of the binary number
Validate Format: Check whether the entered binary number format is correct

Reverse Conversion:

Click the "Reverse Conversion" button to convert the octal result back to binary. Both single and batch reverse conversion are supported.

FAQ

Binary numbers can only contain the characters 0 and 1. Please check whether your input contains any other characters. Spaces are allowed and will be ignored automatically.

Every 3 binary digits correspond to 1 octal digit. Starting from right to left, group every 3 digits together. If a group has fewer than 3 digits, pad it with 0 on the left, then convert each group to the corresponding octal digit (000→0, 001→1, 010→2, 011→3, 100→4, 101→5, 110→6, 111→7).

Batch mode has no strict quantity limit, but it is recommended to process no more than 1000 numbers at a time to ensure good processing speed and stability.

The three-bit grouping feature helps you view the binary-to-octal conversion process more clearly. Every 3 binary bits correspond to 1 octal digit, and after grouping, you can intuitively see the octal digit corresponding to each group.

Yes, the tool supports converting binary numbers of any length. Whether the binary number has just a few digits or several thousand digits, it can be accurately converted to the corresponding octal number.

Reverse conversion converts octal numbers back to binary. Each octal digit (0-7) corresponds to 3 binary bits. The tool automatically converts each octal digit into the corresponding 3-bit binary value, then removes leading zeros to get the result.

This is normal. Just as decimal numbers do not show meaningless zeros at the beginning, octal results also automatically remove leading zeros. For example, binary "001" converts to octal as "1" rather than "01".

Binary to Octal Converter

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Tool Usage

Conversion Details

Conversion Examples

Binary to Octal Basics

Tips

Instructions

Software Usage Instructions

FAQ

Why does the number I entered fail to convert?

What is the principle behind binary-to-octal conversion?

How many numbers can batch mode process at most?

What does the three-bit grouping feature do?

Can very long binary numbers be converted?

How does the reverse conversion feature work?

Why are zeros sometimes not shown at the beginning of the conversion result?

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