I'm not so sure it's that accurate a measure, but....

Here are my responses to the Class questionnaire that's been going around:

Father went to college (for years and years, part time at night, while working days...)
Father finished college   (when he was in his 50's and I was in college myself)
Mother went to college
Mother finished college 
Have any relative who is an attorney, physician, or professor (my great grand uncle was a physician in Sweden in the late 19th/early 20th century, before he came to the United States)
Were the same or higher class than your high school teachers  (probably the same as some of them. Not higher than any of them.)
Had more than 50 books in your childhood home
Had more than 500 books in your childhood home
Were read children's books by a parent
Had lessons of any kind before you turned 18 (piano - 6 mos., art - 6 mos., voice - 2yrs, paid for by my grandparents)
Had more than two kinds of lessons before you turned 18
The people in the media who dress and talk like me are portrayed positively
Had a credit card with your name on it before you turned 18
Your parents (or a trust) paid for the majority of your college costs
Your parents (or a trust) paid for all of your college costs
Went to a private high school
Went to summer camp
Had a private tutor before you turned 18
Family vacations involved staying at hotels (Sometimes. We didn't go on many vacations, though. I think I remember three that involved hotels or motels.)
Your clothing was all bought new before you turned 18 (Believe it or not, no. Even though I was an only child, I got hand-me-downs from a couple of neighbor families with kids just a bit bigger than me. And I was happy to have them, because they were good clothes.)
Your parents bought you a car that was not a hand-me-down from them
There was original art in your house when you were a child (My mother sketched and painted, and my parents also bought a couple of paintings at "starving artist" sales.)
Had a phone in your room before you turned 18
You and your family lived in a single family house
Your parent(s) owned their own house or apartment before you left home 
You had your own room as a child (Well, I'm an only child, and my parents did own a whole house)
Participated in an SAT/ACT prep course
Had your own TV in your room in High School
Owned a mutual fund or IRA in High School or College
Flew anywhere on a commercial airline before you turned 16 (Mom and I accompanied Dad on a business trip to California when I was 14, and took a loan on an insurance policy to be able to do so)
Went on a cruise with your family
Went on more than one cruise with your family
Your parents took you to museums and art galleries as you grew up (Museums, anyway)
You were unaware of how much heating bills were for your family (I only knew it was expensive, but nothing more specific than that)

(This exercise comes from here.)