A conventional elevation sketch depicts what can be seen from ground level upwards, but it lacks perspective and is more comparable to a flowchart than a real-world picture of a building. In general terms, the height of a skyscraper is measured from the bottom of its lowest floor to the top of its highest floor or roof. The average height of a skyscraper is 100 floors (200 meters). The tallest building in Chicago is 102 stories tall (2137 feet). The second tallest is 90 floors tall (1830 feet). The third tallest is 80 floors tall (1550 feet). The fourth tallest is 70 floors tall (1290 feet). The fifth tallest is 60 floors tall (1150 feet). The sixth tallest is 50 floors tall (1100 feet). The seventh tallest is 40 floors tall (850 feet). The eighth tallest is 30 floors tall (550 feet). The ninth tallest is 20 floors tall (410 feet). In conclusion, most skyscrapers are between 100 and 200 feet high.