Google converts it accurately, but people are just too MIND-NUMBINGLY STUPID to know that 5.5 feet (with a decimal) is 5 feet 6 inches (since there are 12 inches in a foot; half a foot is six inches, or 0.5 feet).
That's why when stupid people ask me for my height after I point out I'm a short-sh*t and I tell them it's 181 cm (as I might as well say it in the crappier measurement system, cause at least it's a larger number and makes me feel less girl-sized), they go to Google and then think 5.9 feet is the same thing as 5 feet 9 inches (which would actually be 5.75 feet).
When converting from feet-and-inches to metric, just remember that one inch is roughly 2.5 centimeters.
170 cm is 5'7". 5'8" is 172.5 cm (most round up or down to the nearest whole number). 5'9" is 175 cm. 5'10"is 177.5 cm. And so on...
Here, have my height chart. Easy conversions for ya. Equally sh*tty word count to my height... :(
Some websites don't extend the decimal that far in their conversions. But there is no way it should come out as 5.7 feet. With rounding you could expect to see:
5.5774 or 5.577 or 5.58 or 5.6
some websites might simply lop off a digit or two without rounding. Hence 5.7
It may be possible that in some countries, people are not informed as to the exact length of a foot and that may factor in somehow. This due to the fact that most countries do not use feet like we do.
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that's just how decimals work... actually decimals do work well, but it's the English system that complicates it all, and makes it all fucked up, that's why sites will never agree on how to do it.
but also, some sites might be giving you ft only, so that would imply decimals... while other sites might be giving you results in ft and inches
