I would like a Chrome or Firefox extension that notices when I type something like a hundred m2 or 100 m2 into a comment box (there are not so many grammatically valid combinations so it is not too hard) and it turns it into a link saying 1076 sqft, for example linking to a Google search, they do the conversion automatically when I type "100 m2 to sqft" into Google. I really dislike non-metric units, but I have to be realistic, when I want to discuss say what is a good size for a family of 3 on the English speaking Internet, I guess better cut some slack for imperial units.