Just an FYI for those in DC: on that calculator, Washington is listed under the state of Virginia. Geographic boundaries are tricky business, but c'mon, CNN. You could at least pretend District of Columbia is a state.
But it's not a state, it's a district. I'll grant you that it's obviously a place where people live and work; but a state it is not.
I did say "pretend." I'm not interested in debating DC statehood, rather I am interested in a good user experience. In my case, I actually live in Maryland, yet I had to pull up Virginia to find my metro area.