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Octal System (Base 8)

Tool to convert to octal base (base 8) or from octal base. Octal base is mostly used in computer science. Numbers written in octal system use numbers from 0 to 7.

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Octal System (Base 8) -

Tag(s) : Arithmetics

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# Octal System (Base 8)

## Base N to Octal Converter

Tool to convert to octal base (base 8) or from octal base. Octal base is mostly used in computer science. Numbers written in octal system use numbers from 0 to 7.

### How to write a number in base 8?

For complete explanations on how to convert from $N_1$ base to $N_2$ base, see the base-N conversion tool.

Example: $123$ in base $10$ (also noted $123_{(10)}$) is equal to $173$ in base $8$ (also noted $173_{(8)}$)

### How to convert an octal number?

For complete explanations on how to convert from $N_1$ base to $N_2$ base, see the base-N conversion tool.

Example: $123$ in base $8$ (also noted $123_{(8)}$) is written $83$ in base $10$ (also noted $83_{(10)}$)

### How to recognize octal numbers?

The octal numbers can not have a digit $8$ or $9$.

In computer science, it is usual to display an initial zero in front of an octal number to indicate that they are written in base-8.

Example: $12$ in base $8$ is sometimes written $012$ to indicate that it is an octal number.

## Source code

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