# Conversions between Hexadecimal and Binary

Learn how to easily convert between hexadecimal and binary notation.

## Why is this conversion important?

As mentioned in the lesson on the hexadecimal system, the system’s main power lies in the compactness and ease of representation it brings to the binary system. Binary numbers with 8, 16, and 32 digits are often used in computers (we’ll cover this in detail later). The hexadecimal system is a natural extension of that notation, because it considers groups of four binary digits.

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