What is the octal number system?

The octal number system is a base-8 system that uses eight digits, 0 to 7, to represent numbers. It's sometimes used in computing as a more human-friendly alternative to binary.

Can I convert fractions or decimal numbers with a fractional part?

This tool is designed to convert whole numbers (integers). To convert fractions, you need a different approach.

Are there any limitations on the size of the decimal number I can convert?

The tool can handle a wide range of decimal numbers, but extremely large numbers might be limited by processing power.

Decimal to Octal Converter

Convert decimal numbers (base-10) to octal numbers (base-8) with this simple online tool.

Decimal number

How to Use This Tool

Enter the decimal number you want to convert into the input field.
The octal equivalent will be displayed automatically.
Copy the result if needed.

Learn More About Decimal to Octal Converter

Decimal to Octal Conversion

To convert a decimal number to octal, repeatedly divide the decimal number by 8, noting the remainder at each step. The octal digits are the remainders, read in reverse order.

Example

Decimal: 19

19 / 8 = 2, remainder 3 2 / 8 = 0, remainder 2

Octal: 23 (reading remainders in reverse)

About

Convert decimal numbers (base-10) to octal numbers (base-8) with this simple online tool. Just enter a decimal integer, and the converter will instantly display its octal equivalent.

Use Cases

Computer science education and learning about octal numbers
File permission settings in Unix-like operating systems
Embedded systems programming
Representing data in a compact format

Frequently Asked Questions