title: Convert any length signed hexadecimal number to signed decimal number (Excel)
body: <p><strong><em>Question</em></strong></p>
  
  <p>When faced with signed hexadecimal numbers of unknown length, how can one use Excel formulas to easily convert those hexadecimal numbers to decimal numbers?</p>
  
  <p><strong><em>Example</em></strong></p>
  
  <pre><code>Hex
  ---
  00
  FF
  FE
  FD
  0A
  0B
  </code></pre>