Hexadecimal to Octal Converter

Online hexadecimal to octal converter, supports single and batch conversion, including decimal point conversion, provides detailed conversion steps, and results can be downloaded in CSV format

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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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

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Single Convert

Hex Number

Supports positive/negative numbers and decimals; only 0-9, A-F

Octal Number

Show conversion result automatically

Batch Convert

Batch Input

One hex number per line; supports positive/negative numbers and decimals

Base Comparison Table

Decimal	Hexadecimal	Octal	Binary
0	0	0	0000
1	1	1	0001
2	2	2	0010
3	3	3	0011
4	4	4	0100
5	5	5	0101
6	6	6	0110
7	7	7	0111
8	8	10	1000
9	9	11	1001
10	A	12	1010
11	B	13	1011
12	C	14	1100
13	D	15	1101
14	E	16	1110
15	F	17	1111

How it works:

Hex → Binary → Octal

1. Each hex digit maps to 4 binary bits

2. Each 3 binary bits map to 1 octal digit

3. Group from the decimal point outward

Instructions

Software Usage Instructions

Single Conversion Mode

Enter the hexadecimal number to convert in the "Hexadecimal Number" input box (e.g., A3F, 2B.8C, -1A.5)
The system will automatically display the corresponding octal number, or you can click the "Convert" button
Click "Show Conversion Steps" to view the detailed conversion process
Supports positive and negative numbers, as well as hexadecimal numbers with decimal points

Batch Conversion Mode

In the batch input area, enter one hexadecimal number per line
Click the "Batch Convert" button to start conversion
Conversion results will be displayed in a table, including success and failure statuses
Click "Download Results" to save the conversion results as a CSV file

Input Format Requirements

Can only contain digits 0-9 and letters A-F (case-insensitive)
Negative numbers are supported; add a "-" sign before the number
Decimal points are supported, in formats such as: A3.F2
Scientific notation or other special formats are not supported

FAQ

What formats of hexadecimal numbers does the tool support?

It supports standard hexadecimal numbers (0-9, A-F), including positive numbers, negative numbers, and numbers with decimal points. For example: A3F, -2B.8C, FF00.123, etc. The 0x prefix is not supported.

Why does my conversion result show an error?

Please check whether the input contains invalid characters, and make sure to use only 0-9 and A-F characters. If it contains a decimal point, make sure there is only one decimal point. The minus sign can only appear before the number.

How many numbers does batch conversion support?

In theory, there is no quantity limit, but for better performance, it is recommended to convert no more than 1000 numbers at a time. Converting large amounts of data may require a longer wait.

Can the conversion results be saved?

Yes. After batch conversion is complete, click the "Download Results" button to save the conversion results as a CSV file, including the original data, conversion results, and status information.

What is the conversion principle?

The conversion uses the "hexadecimal → binary → octal" method. Each hexadecimal digit is converted into 4 binary bits, then the binary is grouped in sets of 3 bits and converted to octal. A detailed base conversion reference table is available at the bottom of the tool page.

How are decimal point conversions handled?

The fractional part is converted similarly to the integer part, but when grouping binary digits, the fractional part is padded with zeros to the right until it reaches a multiple of 3. For example: hexadecimal A.5 is converted to binary 1010.0101, grouped as 010.010, and finally becomes octal 12.2.

Hexadecimal to Octal Converter

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Tool Usage

Single Convert

Conversion Steps

Batch Convert

Conversion Result

Base Comparison Table

Instructions

Software Usage Instructions

Single Conversion Mode

Batch Conversion Mode

Input Format Requirements

FAQ

What formats of hexadecimal numbers does the tool support?

Why does my conversion result show an error?

How many numbers does batch conversion support?

Can the conversion results be saved?

What is the conversion principle?

How are decimal point conversions handled?

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