The USGS has estimated the potential contribution of melting ALL of the glacial ice around the world to sea level rise. This is very rough, because many different factors affect sea level, including ocean temperature, gravity, and current. But this gives a rough idea. If the release of CO2 and other greenhouse gasses continues apace, we could actually see the eventual melt of all of this ice. If we stop releasing these greenhouse gasses in a reasonable time, it is unlikely that these very large numbers will be achieved. But it is important to realize the potential, to understand that the amount of available ice to melt into the sea is so large that that factor in and of itself will not come to our rescue.
I made a map, which is also very approximate, indicating about where the sea will reach in much of North America, and posted it here.
So, the following data are from the USGS. The total is just over 80 meters, which is about 263 feet:
Potential Sea Level Rise
|Potential Sea Level Rise
|East Antarctic Ice Sheet
|West Antarctic Ice Sheet
|All other ice
Poore, R.Z., Williams, R.S., Jr., and Tracey, Christopher, 2000, Sea level and climate: U.S. Geological Survey Fact Sheet 002–00, 2 p., at http://pubs.usgs.gov/fs/fs2-00/.