Oops. Looks like you're off by a factor of 1000, since Wolfram is saying the total is 131.6m sq. miles (487k sq. km). [1] But what's three orders of magnitude among friends...
The Antarctic Ross ice shelf is about 188k sq. miles, and up to 750m thick. Again according to Wolfram Alpha, that makes 3.653×10^17 L (liters) of ice. 92% of that is 3.36×10^17 L (liters).
And if you spread that many liters over the (Wolfram Alpha) area of the the oceans, you get nearly a meter sea level rise (0.9856). That's one (albeit large) shelf.
The Greenland ice sheet comes to almost 4.27×10^18 L (liters) of ice (based on numbers from Wikipedia and an average thickness of 2.5km) [2]. We're up another factor of 10 here, with 12.530 meters of rise now.
According to WikiPedia, the Antarctic Ice Sheet contains 30m cubic km of ice, and they claim it's worth 70m of ocean depth. [3]
But let's crunch some numbers. If you assume 92% density you get 2.76×10^7 km^3. Again in Alpha I get 80.96m [4], or 265'. The truth is that, as the sea level rises, the SURFACE AREA will change (because so much land will be flooded), and so even though the combined rise of all ice melting might be 300' at the current area of the oceans, the estimates are that it would only rise about 200', plus or minus.
So how do the numbers not agree with me? THIS is why it's useless to take an engineer's view of something like climate change. Misplace a decimal point (or cube when you really mean 4pi r squared) and suddenly you're making all kinds of crazy assumptions. And yes, I forgot the surface area of a sphere too, but the more serious error is assuming your rusty memory of a math equation can prove that ALL THE EXPERTS are wrong and you're smarter than they are.
[1] http://www.wolframalpha.com/input/?i=area+of+all+oceans&... [2] http://en.wikipedia.org/wiki/Greenland_ice_sheet [3] http://en.wikipedia.org/wiki/Antarctic_Ice_Sheet [4] http://www.wolframalpha.com/input/?i=%2830+million+cubic+km+...