• Expand this window to take up your whole screen.
  
• Then look at the photos below and find the one that completely fills up the screen from left to right.
  
• When you're done, scroll to the bottom of this page for further instructions.
  

If the image below completely fills your screen from left to right and you can see it completely,
your screen resolution is approximately 800x600.

If the image below completely fills your screen from left to right and you can see it completely,
your screen resolution is approximately 1024x768.

If the image below completely fills your screen from left to right and you can see it completely,
your screen resolution is approximately 1152x768.

If the image below completely fills your screen from left to right and you can see it completely,
your screen resolution is approximately 1240x854.