No, you are definitely not the upper class if you are making 100k. If you live somewhere like Bay Area or NYC you are not even upper-middle class. And usually to be considered upper class you have to have enough wealth to afford not to work at all.
Average Salary:
San Francisco, CA: $79,000
Austin, TX: $55,000
Iowa City, IA: $54,000
Average House Price:
San Francisco, CA: $637,100
Austin, TX: $200,500
Iowa City, IA: $169,700
(For house prices, I picked CA and a couple other random states and picked the city with the highest average house price for each state listed on http://www.zillow.com. Then found the average salary for each of those places on http://www.indeed.com. I didn't have time to list them all. This is by no means a complete, dead-solid picture... but you might get the idea.)Also, I don't know if there is a better calculator out there now but I recall this one[1] being passed around back when it was a fairly new trend to hate on the 1%. Currently, $100K puts in at 81% on its scale... or "the top 19%" to use your scale. You would need to make $220K to be in the top 5%.
[1] http://blogs.wsj.com/economics/2011/10/19/what-percent-are-y...
It's frustrating that the people making these calculators don't state how many working individuals makes up one household. One of the problems I'm seeing in these comments is that some of us are talking about individual income, and some household/family income.