But what if I'm 17.5cm

Why would you tell that to anyone?

Particularly one who doesn't understand significant figures. Are you certain that you're precisely 74.000 inches, without even a thousandth of an inch of rounding? If not, you don't get to use 5 sigfigs when converting.

Wait I've checked this, a Big Mac is 3,5 inches in height. That's 94,5 inches not 74.

Seriously, I'm an European and don't know what I am talking about. Inches, Feet, Legs, Elbows... Lol only in america.

Historians will get the Elbow joke.

Your comment made me realize how we take for granted that everyone at least measures time the same way. Imagine the clusterfuck if there was metric time & imperial time.

M/s to km/h is nowhere near as bad as any of the imperial conversions though. (M*60*60)/1000... Or, M*3.6 if you want to simplify it.

In my native language we say the equivalent of 'one and eighty-five' to refer to 185 cm of height, so basically we give it in meters.

Unless you happen to be 2 meters tall, yes, you would give your height in cm. You might round it, but you'd never say you're 1.8m tall.

I just say "one sixty five", and so do most people in the Netherlands (most use different numbers though)

In France it's generally in meters with two decimals, so basically the same as giving it in cm

Not europe but yes, we do it in cm. Never heard people rounding up or down to the tenth though, so 164cm is 164cm, not 160cm.

Yes where I live, we use cm usually. Also height is almost always measured without shoes

176cm would be given as "eins-sechsundsiebzig" in German, literally translating to one six and seventy (yeah it's backwards), which works exactly like currency.

Not European, but from a country that also uses the metric system. We give out our height in meters, as you said. Saying it in cm would be okey for medical reasons I suppose. Also there isn't much difference in what unit you use, you just have to multiply/divide by 100, which is easily done in your head

Germans do go with meters when talking about their height but they'll give you two decimal places.

Do North Americans really give their weight in lb? You'd think they'd short hand it like to like 15 stone or whatever since weight is one of those things that doesn't really need to be exact and will change by a lb or so based on the time of day and what you've eaten.

You always do it in cm wherever I've been. It's either directly in cm, as in 172 cm or phrased in meters, as in 1.72 m. You cab say you're around 170 cm tall or around 1.7 m tall, but the 'default precision level' is 1 cm