Canada began implementing the metric system in 1970, the year after I was born. Metrification, as carried out by a special government body, the Metric Commission, was not welcomed by all Canadians, no sir. It was a long process, and stuff like speed limit signs were in MPH well into the 70s. As such, most Canadians my age are quite fluent in both US and Canadian units of measurement. This is particularly true when it comes to measures of length, since most people here still refer to things like height and weight in feet, inches and pounds.
I have never heard anybody say "wow, it was like getting hit over the head by a 5X10!" (2"= 5.08cm, and 4"= 10.16cm). I wasn't planning on ranting in this post, but that last sentence reminds me of a pet peeve of mine. Why the hell do we and the lumber industry refer to cut lumber in its pre-planed dimensions? After the first time you figure out that a 2X4 is really a 1.5X3.5 it is not that big a deal, but when you are using materials to build or design something, why should you have to remember something like that, huh? I'm really glad bikes aren't made of wood; well, not usually anyway:
Speaking of bikes, American cyclists are probably among the more metriliterate US Citizens, since metric units on bikes and bike components are common. Most Americans, including cyclists, however, are not very likely to use metric in referring to temperature. Temperature is pretty much the only area in which I have been completely metrified. I have difficulty thinking in Fahrenheit. I know that 100F is a stinkin' hot day, and that 32F is freezing point, but otherwise I have to stop and use a converter or table when I write about how cold it was.
The lion's share of visitors to this blog are American, and I want the measurements to be relevant to them, but it is a pain in the butt to do the conversions because math is not a strong suit of mine and I can't do them on the fly in my head. I am no longer going to stop and convert the temps I write about into Fahrenheit, because I am lazy. So: What to do?