How to convert from binary to octal?

Convert every 3 digits of the binary number (start from bit 0) to 1 octal digit, using this reference table:

Example:

Convert the binary number 1011011 to octal number:

Convert every 3 binary digits (from the first digit) to an octal digit:

1011011₂ = 1 011 011 = 1 3 3 = 133₈

Below is the reference table for converting binary number to decimal, octal, hexadecimal, ranging from 0₁₀ to 15₁₀: