Please have a look at the following article for an overview of Binary, Octal, Decimal & Hex values.

What are Binary, Decimal, Octal & Hexadecimal values?
In this article, I explain Binary, decimal and octal numbers with examples. Binary values are also known as Base 2 values.

Octal to binary:

We know that Octal values are base 8 values and we need 3 bits to represent each octal digit. Octal values can be easily converted to binary values by replacing each octal digit with their equivalent binary value as shown below.

You can refer to decimal to binary conversion to know how the below binary combinations are generated for octal digits.

Octal digit representation in binary

000 ---> 0
001 ---> 1 
010 ---> 2
011 ---> 3
100 ---> 4
101 ---> 5
110 ---> 6
111 ---> 7

Octal --> 4573

Binary --> 100101111011

Octal to decimal

Steps to follow:

  1. Octal to Binary (Refer to above section)
  2. Binary to Decimal (Refer to the previous article)

Example:

Octal : 4573

Binary: 100101111011

Decimal: 2427

Octal to Hexadecimal

Steps to follow:

  1. Octal to Binary (Refer to above section)
  2. Binary to Hexadecimal (Refer to the previous article)

Example:

Octal: 4573

Binary: 1001011110111011

Hexadecimal: 97B