I just learned something interesting. From the ground floor to the top of the Empire State Building is 1576 stairs.

My two flights of stairs are 31 stairs. How many trips would be equal to the Empire State Building? 1576/31 = 51 trips up and down. I might try that tomorrow. I did 40 tonight.

It's not the same level of exertion, of course, because I'm resting on the way down every minute or so. But it will be the same elevation gain!