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I didn't know they used 0-indexed buildings in ingerland

Zero-indexed versus one-indexed. You all know which is the right one

Hot tip in the US. In an elevator the floor with the star is the ground floor, regardless of what number is present. This helps clarify any confusion between systems and also is clear for locations that have floors below the ground floor (I've most commonly seen this with parking structures)

I like ground being 0. That way you have a continuous number line from basement to the top:

-2 -1 0 1 2 3 4 5

Wait for the old spanish way of doing it. It was abandoned some 40-50 years ago and now we use the same as the british system, but the traditional way of doing it was (bottom to top on this same image): -Bajos -Entresuelo -Principal -First

I feel like the British way should always be phrased like "first floor up" or "third floor up" because then you count starting at zero. American way should be phrased as "the first floor" or "the fourth floor."

Don't forget the mezzanine. Super bon bon!

As some one outside both countries 1 2 3 4 5 is where it's at. The second floor being the first makes no sense.

Erdgeschoss, same here.

Wait until you reach the 13th floor

More or less everybody except US and Russia has zero floor, counting in big office buildings is fun: 3,2,1,-1,-2, I know... The concept of a number zero is not that old (couple hundred years, don't remember the details), but should be enough to update your language :-*

I live under the British system (Australia) of floor naming.

So annoying.

This is where it’s a benefit to live in a hilly area. For a building on a hill, it’s quite normal to enter on a different floor depending on whether you’re on an uphill side or downhill side. The main entrance to my son’s dorm is the third floor

I just assume the Brits are on a hill or slightly tilted

Ok so I need some clarification. Building has a crawlspace so there are a few steps up to the front door (please don't tell me the front has some weird name too), so the entrance level isn't necessarily the ground level what do you do?

Option 2 the building is built on uneven ground so the front entrance is ground level but the back entrance is on the floor below the entrance level. How do you number that?

For simplicity sake front refers to street view side and back is the opposite of front.

Same thing in Spain

do Brits skip 13?