A handy online tool to visualise how much content visitors to a web site will see without scrolling when using typical pixel resolutions.
To use this simply enter a web address and select “Go”. The web page will be returned with an overlay visualisation indicating a range of typical display regions together with an approximated percentage of visitors who can see the area without scrolling. The percentage is based on information gathered from visitors to Google websites.
For example, the “90%” contour means that 90% of people visiting Google have their browser window open to at least this size or larger.