Only vaguely relevant, but I grew up in a rural area in Canada which caused me to learn a strange set of units. For me, highway distances are measured in kilometres, but country roads are measured in miles. Groceries are priced per kilogram, but my weight is in pounds. I readily swap inches and centimetres for measuring small sizes and distances (sometimes on the same project). I am more comfortable with Celsius, but the thermostat in my parents' house was in Fahrenheit.
Just to throw an additional wrench into things, prior to official metrification (which technically predates my birth), Canada used "imperial" (i.e. British) units, not "standard" (i.e. U.S.) units. Because of this and the close proximity to the U.S., one had to be careful about just which gallon or pint you were talking about.
People younger and/or more urban than me seem to be 100% metric. I am starting to learn my weight in kilograms, but I still have no idea what my height is in cm without converting.
Just to throw an additional wrench into things, prior to official metrification (which technically predates my birth), Canada used "imperial" (i.e. British) units, not "standard" (i.e. U.S.) units. Because of this and the close proximity to the U.S., one had to be careful about just which gallon or pint you were talking about.
People younger and/or more urban than me seem to be 100% metric. I am starting to learn my weight in kilograms, but I still have no idea what my height is in cm without converting.